Format Legality
Noble Legal
Leviathan Legal
Magic Duels Legal
Canadian Highlander Legal
Vintage Legal
Vanguard Legal
Legacy Legal
Archenemy Legal
Planechase Legal
Duel Commander Legal
Unformat Legal
Casual Legal
Commander / EDH Legal

Printings View all

Set Rarity
Premium Deck Series: Slivers (PDS) Uncommon
Stronghold (STH) Uncommon

Combos Browse all



Activated abilities of creatures cost less to activate. This effect can't reduce the amount of mana an ability costs to activate to less than one mana.

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Recent Decks

Heartstone Discussion

Neotrup on Can Elite Arcanist cast copy ...

2 weeks ago

No. Jace's Sanctum has no effect on anythings converted mana cost. Elite Arcanist chooses the value of X based solely on the exiled cards converted mana cost, not on how much you'd actually have to pay to cast the spell. If Elite Arcanist has exiled Wizard's Lightning it will cost to activate it's ability and cast the copy, even though it is a wizard itself. Anything that alters the cost to activate abilities, such as Heartstone will apply to the activation cost however.

Naiop2 on Constellation of Daxos

3 weeks ago

Very interesting deck with constellation!

Your mana curve doesn't spike too quickly, so I would scale down to at least 37 lands. With only being dual-color, Terramorphic Expanse and Evolving Wilds don't add too much value because they're slow lands. Your mana rocks do a good job of balancing your colors. If you're nervous about getting raw mana, consider Thran Dynamo and Worn Powerstone.

You have a lot of very useful artifacts that can accelerate your game. Having Caged Sun, Gauntlet of Power, and Heartstone make Daxos' ability easy to take advantage of, and Illusionist's Bracers gets you even more value. However, I don't see much of a way to get to these artifacts. Diabolic Revelation is great, but it only happens once. If you use it to deal with a situation, then you might not be able to get to your value pieces. I would suggest adding in a few more tutors, such as Demonic Tutor, Diabolic Tutor, and Vampiric Tutor.

You have a few Oblivion Ring effects in your deck. While they're really nice for the experience and the constellation triggers, you might want to consider replacing some of them with instant-speed removal. Path to Exile, Swords to Plowshares, Return to Dust and Erase are some pretty good staples.

If you're looking for cards to cut, I've noticed that you have a lot of indestructibility in the deck, in both artifact and enchantment form. Redundancy is good, but if you can tutor to Darksteel Plate, the only benefit Indestructibility gives you are more constellation triggers. You also seem to be prepared to have your enchantments wiped multiple times. Crystal Chimes is vulnerable to artifact removal, and is more expensive than Dawn to Dusk.

Great work, it looks like a fun deck to play!

Cadois on Sliver EDH Control Deck

1 month ago

Oh, and I noticed you don't have a Sliver Queen. I know it is hard to get, but when you do you'll see how the game goes waaaaaaaaaay easier. It's pretty much guaranteed to combo every game unless focused.

Sliver Queen + Heartstone or Training Grounds + Basal Sliver or Ashnod's Altar and you can make pretty much everything you want.

With Basal Sliver + Gemhide Sliver you can tap, add one mana of any color, then sac and generate two black. You won't even need Heartstone or Training Ground to pull of infinity.


killadevils on Sliver EDH Control Deck

1 month ago

Heartstone is another artifact you can use in place of Training Grounds to reduce the cost of your slivers abilities although it does work for the other players in the game as well.

Warstorm Surge allows for targeted removal as you play slivers because it is an ETB effect all slivers will enter with all the abilities they would be getting from the rest of your slivers.

Crypt Sliver is a nice way to keep your slivers alive by giving them all regenerate.

Psionic Sliver is one of the slivers I didn't much like when I was building my deck due to the feedback damage from it triggering your own deathtouch on your own creatures. Burning Sands is also a card that you need to be careful of yourself incase you get wiped and lose all of your lands.

As it stands the sliver deck I made had a higher budget and was a different style to yours. The bomb I had was Primal Surge with no other non-permanent cards in the entire deck. My play group also liked to wipe out the board in various different ways on me so cards that could hurt me I had to avoid.

Torekai92 on The Ur-Dragon, Progenitor of Fire

1 month ago

Cinder_Kitten oh wow, I have those cards laying around but never thought about that exact combo. That is intriguing, thanks for the suggestions! I will try it out, but i'd be a little hesitant to mainboard Heartstone since I don't have too many dragons that could make use of it.

KingofCorns on Grenzo, Dungeon Warden EDH

1 month ago

Heartstone makes activating him cheaper, Workhorse can be sacced for 4 mana (combo potential), Epitaph Golem let's you stack the bottom as does Clone Shell.

JuQ on Slimefoot, the Stowaway

1 month ago

Deadly Tempest seems a weird card choice for a saproling deck, virtually any other board wipe would be a better deal.
You can also go infinite with Illusionist's Bracers and the Ashnod's Altar.
If you have a spare Doubling Season there is no reason not to include it over Primal Vigor. You can run them both.
Heartstone maybe?
More card engines, I always try to include at least eight of them. The usual suspects for me are Deathreap Ritual, Shamanic Revelation, Skullmulcher, Disciple of Bolas, Phyrexian Arena, Seasons Past, Vampiric Rites...
I'd add some board pumps as win conditions in order not to depend just on Ashnod's Altar, it can be removed or countered. Overwhelming Stampede, Beastmaster Ascension, Triumph of the Hordes, Bloodspore Thrinax or Craterhoof Behemoth, all of them are solid cards.
To make space I'd drop the thallid theme (keeping Psychotrope Thallid as card engine), it doesn't feel strong enough, but if you still really want to go with the thallids I'd add Winding Constrictor.
I would also cut Champion of Stray Souls and Verdeloth the Ancient.

KingofCorns on Mycelium Madness

1 month ago

I like this, I'll probably make something similar with Thelon and all the thallids I pulled out of Ghave, Guru of Spores. I'd suggest Winding Constrictor for extra spore counters, Ashnod's Altar for infinite damage combo with Primal Vigor + Slimefoot, the Stowaway , lastly, Heartstone reduces the activated cost of his ability, could incrementally help you out.

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