Aragorn, the Uniter + Whitemane Lion + Phyrexian Altar + Adrix and Nev, Twincasters

Aragorn, the Uniter

Whitemane Lion

Phyrexian Altar

Adrix and Nev, Twincasters

How it works

1. Cast Whitemane Lion by paying 1.
2. Aragorn's first ability triggers, creating two 1/1 Human Soldier creature tokens.
3. When Whitemane Lion enters the battlefield, it triggers, returning itself from the battlefield to your hand.
4. Activate Phyrexian Altar twice by sacrificing the Human Soldiers, adding 1.
5. Repeat.