Squall, SeeD Mercenary + The Peregrine Dynamo + Phyrexian Altar

Squall, SeeD Mercenary

The Peregrine Dynamo

Phyrexian Altar

How it works

1. Deal combat damage to an opponent using Squall, triggering its second ability.
2. Holding priority, activate The Peregrine Dynamo by paying 1 and tapping it, targeting Squall's ability.
3. Holding priority, activate Phyrexian Altar by sacrificing The Peregrine Dynamo, adding 1.
4. Resolve the Peregrine Dynamo ability, copying Squall's trigger, with the new trigger targeting The Peregrine Dynamo.
5. Resolve the copy of Squall's trigger, returning The Peregrine Dynamo from your graveyard to the battlefield.
6. Repeat from step 2.