Nico

When this creature enters the battlefield, target creature may be converted into Vialism(Creatures with Vialism have “{T}: Sacrifice this creature, Add {B}“). When a sorcery or spell targets a creature, you may choose to give that creature the mark of Nico which places the creature under your control until combat damage is dealt to it. Vialism-{T}: Sacrifice this creature, Add {B}. {1}{B}{W}: Convert target creature into Vialism.{/fontsize-25}