Enduring Renewal + Phyrexian Altar + Cubwarden + Semblance Anvil

Enduring Renewal

Phyrexian Altar

Cubwarden

Semblance Anvil

How it works

1. Cast Cubwarden for its mutate cost by paying , targeting a non-Human creature you control.
2. The Cubwarden mutated creature triggers, creating two 1/1 Cat creature tokens.
3. Activate Phyrexian Altar by sacrificing the Cubwarden mutated creature, adding .
4. When the Cubwarden mutated creature dies, Enduring Renewal triggers, returning Cubwarden and any cards merged with it from your graveyard to your hand.
5. Activate Phyrexian Altar by sacrificing a Cat token, adding .
6. Repeat.

This loop is a masterclass in recycling your resources, turning Semblance Anvil's crucial cost reduction into an engine for endless value. By exiling a creature card with Semblance Anvil, you shave {2} off Cubwarden's mutate cost, allowing you to recast it cheaply and trigger its ability to flood the board with two 1/1 Cat tokens. Each time your creatures meet their end, Phyrexian Altar provides the mana while Enduring Renewal ensures that Cubwarden—along with any cards merged beneath it—bounces right back to your hand instead of staying dead. The resulting cycle lets you continually sacrifice your newly spawned tokens and the recast Cubwarden to the Altar, generating an infinite stream of sacrifices, enters-the-battlefield triggers, and a massive storm count.