Ikit Claw, Chief Warlock

Haste
At the beginning of your postcombat main
phase, untap any number of artifacts you control.
For each artifact untapped this way, it deals 2
damage to you and gains "at the beginning of
your end step, sacrifice this artifact"
{t}: Add X mana of any one color and you lose X
life, where X is half the life you've lost this turn, rounded down. This mana can't be spent to cast
a nonartifact spell.