Sneak Attack + Stormfront Riders + Phyrexian Altar

Sneak Attack

Stormfront Riders

Phyrexian Altar

How it works

1. Activate Sneak Attack by paying , putting Stormfront Riders from your hand onto the battlefield.
2. When Stormfront Riders enters the battlefield, its first ability triggers, returning it and any other creature you control from the battlefield to your hand.
3. Stormfront Riders' second ability triggers twice, creating two 1/1 Soldier creature tokens.
4. Activate Phyrexian Altar by sacrificing a Soldier, adding .
5. Repeat.