Koll, the Forgemaster + Kemba, Kha Enduring + Phyrexian Altar

Koll, the Forgemaster

Kemba, Kha Enduring

Phyrexian Altar

How it works

1. Activate Phyrexian Altar by sacrificing the Cat, adding one mana of any color.
2. The Cat dies, triggering Koll, returning the Cat from your graveyard to your hand.
3. Cast the Cat by paying its mana cost.
4. The Cat enters the battlefield, triggering Kemba, attaching any equipment you control to the Cat.
5. Repeat.