Stalwart Successor + Phyrexian Altar + Lesser Masticore

Stalwart Successor

Phyrexian Altar

Lesser Masticore

How it works

1. Activate Phyrexian Altar by sacrificing Lesser Masticore
2. When Lesser Masticore dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Lesser Masticore enters, Stalwart Successor triggers, putting a +1/+1 counter on Lesser Masticore
4. Repeat.