Requires

Steps

1. Activate Carrion Feeder by sacrificing Elderfang Ritualist.
2. When Elderfang Ritualist dies, it, Deathrender and Death's Oasis triggers.
3. Resolve the Elderfang Ritualist trigger, returning an Elf creature card with mana value four or greater from your graveyard to your hand.
4. Resolve the Deathrender trigger, putting the Elf with mana value four or greater from your hand onto the battlefield, and attaching Deathrender to it.
5. Resolve the Death's Oasis trigger, causing you to mill two cards and return a creature card with mana value two or less from your graveyard to your hand.
6. Activate Carrion Feeder by sacrificing the creature with Deathrender attached.
7. When the creature dies, Deathrender and Death's Oasis triggers.
8. Resolve the Death's Oasis trigger, causing you to mill two cards and return Elderfang Ritualist from your graveyard to your hand.
9. Resolve the Deathrender trigger, putting Elderfang Ritualist from your hand onto the battlefield, and attaching Deathrender to it.
10. Resolve both Carrion Feeder abilities from steps 1 and 6, putting two +1/+1 counters on it.
11. Repeat.

Results