This looks really fun! It seems you're a littlelight on removal, so maybe consider sth. such as Beast Within and Chaos Warp to get rid of problematic permanents.

As for what to cut, Ruination Wurm and Streetbreaker Wurm aren't optimal choices. They are way too small for vanilla creatures with MVs that high.

Conscript X (When you cast this spell, target opponent may have you gain control of a creature with mana value X they control. If they don't, you add X mana of any one colour.)

Take Down

Sorcery

Conscript 2 (When you cast this spell, target opponent may have you gain control of a creature with mana value 2 they control. If they don't, you add 2 mana of any one colour.)

Destroy target nonland permanent.

Normally, abilities like this are pretty bad because they let your opponent choose the option that benefits you less. But as this is a: pretty restricted in what they can do, and b: on cast, so basically uncounterable, this might be a little better that Tribute etc.

I want to see another card with conscript.

Labyrinth Sponge

Creature - Sponge

Haste, Defender

: Each opponent shuffles a creature they control into their library. You shuffle ~ into your library.

0/1

Create another card for the set.

I've had like seven or more upvotes from you in the last few weeks. Thanks a lot for that!

Seems fine, I'm glad I could help. I totally understand your original reasoning, but the synergy with Davros simply seems to easy to ignore.

Herald of the Surface

Creature - Whale Angel

Surfacing (You may have this creature enter with a flying counter. If you do, it can't block creatures without flying.)

Deepdive 2 (As long as this creature is tapped, it has hexproof. At the beginning of your post-combat main phase, if this creature is tapped, you may put two +1/+1 counters on it.)

5/5

A while ago, I stumbled upon a custom set about an undersea-plane inhabited entirely by marine creatures (technically, there was a second set with the plot twist of there being a surface world with pirates n stuff). Let's do this. So what we know so far is that marine mammals take the position of angels on this plane. What else is there on there? Oh, and please no merfolk. That would seem just lazy.

What I meant is you'd propably not need the damage prevention (which, as legendofa said, should be a replacement effect). Simply doing this on Stonestealer Giant dealing combat damage without having to prevent the damage seems just fine for me.

If this saw print, it would definitely find its way into my giant deck.

Question: Why not make this a combat damage trigger, period? Preventing the damage is a drawback and definitely works flavourwise, but I don't see it being all that necessary. It's a six drop without haste or any form of protection, so having this survive a turn and untapping with it to steal one artifact seems like an appropriate payoff.

Fichte, Tree of the Elder Heart

Legendary Enchantment Creature - Treefolk Saga

~ gains Hexproof, Indestructible and Vigilance.

Reveal cards from the top of your library until you reveal three land cards. Put those lands onto the battlefield, then shuffle the rest into your library.

Search your library for up to one legendary creature card and put it onto the battlefield, then shuffle.

6/7

Create the creature card you'd want to find with Fichte.

How about this:

Whenever ~ deals combat damage to a player, you may sacrifice it. If you do, you may cast the exiled card without paying its mana cost.

You still get to freecast it, buts it's harder to break. Also, it's on flavour with sorceries being powerful one-time spells instead of perservering, enchantment-like magic. And if you need the beater, you can keep it.

Looking at the numbers here, this is propably meant as a commander deck. If so, I suggest you set the format to that.

Can't comment on the deck now because of not enough time, but will have a look later.

As Beast Within has originally been printed in 2011, it technically qualifies as old (...). Sooo...

Protoinstinct

Instant

Destroy target nonland permanent. If a creature was destroyed this way, its controller creatures a 3/2 green beast creature token.

Massive pressure can lead to a return to old habits. Sometimes, reeaally old habits.

Create a commander that wants you to destroy either player's lands.

Ikoriel, Primeval Apex

Legendary Creature - Elder Mutant

Mutate

Flying, Trample, Vigilance.

Whenever ~ mutates, put X +1/+1 counters on it, where X is the number of different colors among its mutations.

2/2

Kibo, Uktabi Prince makes Bananas, which basically are equally worse treasures and worse foods. Make a card that creates tokens that either combine clue and food or clue and treasure in a similar way.

Frontrunner Titan

Creature - Giant

Haste, Trample, Vigilance

Whenever ~ or another giant you control deals combat damage to a player, you draw a card.

6/4

I want you to create a legendary dragon.

This look superfun foe casual. Ever heard of Seton, Krosan Protector? I have a casual naya druids list that does some nasty stuff with Rocco, Cabaretti Caterer and Realm Razer, and Seton is insane in there.

Kibo, Uktabi Sovereign

Legendary Creature - Monkey Noble

Vigilance, Trample, Haste

Whenever ~ attacks, each opponent sacrifices an artifact. For each artifact sacrificed thus way, you create a colorless artifact token named Banana with “, Sacrifice this artifact: Add or . You gain 2 life.”

Sacrifice X artifacts, : Gain control of target nonland permanent with mana value X or less.

6/5

Wild

moo1234: That's exactly the reason I issued the chaalenge ;)

Blizzard Shelter

Snow Land

: Add .

, : Target creature gets +X/+X until end of turn, where X is the number of snow permanents you control.

Create a red card that both ramps and draws cards.

Kari Zev, Skyship Raider seems like a great addition here for the legendary she brings on each attack.

TheOfficialCreator: They're a great band with lots of great messages. And that song kicks especially hard :D