Stalwart Successor + Phyrexian Altar + Furystoke Giant

Stalwart Successor

Phyrexian Altar

Furystoke Giant

How it works

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