Requires

Steps

1. Activate Carrion Feeder by sacrificing Myr Retriever.
2. When Myr Retriever dies, it, Deathrender and Death's Oasis triggers.
3. Resolve the Myr Retriever trigger, returning an artifact creature card with mana value three or greater from your graveyard to your hand.
4. Resolve the Deathrender trigger, putting the artifact creature with mana value three 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 one 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 Myr Retriever from your graveyard to your hand.
9. Resolve the Deathrender trigger, putting Myr Retriever 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