Here's my take on the incredibly fun cards that are Havengul Lich and Heartless Summoning:
Basically the deck wants to cast awesome spells that all work round and round.
Havengul Lich is amazing: it gets to bring back all your former glory. Tap to kill with a Royal Assassin in your grave or build your own army of bats with a dead (or living) (undead?) Bloodline Keeper
, or just bring back the threats themselves for only 1 extra mana! (that's a free Green Sun's Zenith on your graveyard - every turn!)
These are a couple of interactions, and there's so much more (turn 2 summoning, turn 3 Bloodline Keeper + Phyrexian Metamorph, turn 4: 4 vampires, turn 5 transform both + 1 vampire: rumble with a 6/6 and 2 5/5's). What this deck thrives on though, is mostly its consistency, which is why the Heartless Summonings are here. They fortify the deck if you have one out, but they are far from necessary to win.
Casting turn 4 titans, wurmcoils or rune-scarred demons for more big stuff is awesome, and if you get to grab them back from the grave (where they ended up either through removal or Forbidden Alchemy) with the lich, that's just sick gravy.
Ofcourse the
Perilous Myr
/ Havengul Lich / Heartless Summoning "combo" is present (and findable through forbidden alchemy, potentially fixing 2 pieces if you can land a summoning or lich in your hand and the myr in the grave), which lets you repetitively shoot 2 damage for 1 mana, which is usually sufficient to take down the opponent in a turn or 2, or to take down his whole army of stuff.
Black Sun's Zenith, Tragic Slip and
Dissipate
keep the opponent in check until you can crush them.
Let me know what you think!
