Martyr Logarius

Flying, Vigilance. When it enters, return up to one target sorcery, enchantment, or instant from your graveyard to your hand. When it deals damage to a creature, it gains Deathtouch until your next upkeep and puts a Hex Counter on it. Creatures with a Hex Counter can’t block. Whenever a creature you control dies, you may pay {r}. If you do, return a sorcery, enchantment, or instant from your graveyard to your hand.

{r}, Discard a sorcery, enchantment, or instant: Deal damage equal to its mana value