Radagast, Wizard of Wilds + Temur Sabertooth + Phyrexian Altar + Myr Enforcer + Doubling Season

Radagast, Wizard of Wilds

Temur Sabertooth

Phyrexian Altar

Myr Enforcer

Doubling Season

How it works

1. Cast Myr Enforcer by paying 0.
2. Radagast triggers, creating two 3/3 Beast creature tokens.
3. Activate Phyrexian Altar twice by sacrificing the Beasts, adding 1.
4. Activate Temur Sabertooth by paying 1, returning Myr Enforcer from the battlefield to your hand.
5. Repeat.

This ingenious loop is anchored by Myr Enforcer, whose artifact affinity allows it to be cast for free, immediately triggering Radagast, Wizard of Wilds to reward that heavy mana-value spell. Thanks to Doubling Season doubling the output, Radagast produces a pair of 3/3 Beast creature tokens instead of just one, which you then sacrifice to Phyrexian Altar to generate the exact green and generic mana needed to fuel the engine. Finally, Temur Sabertooth uses that freshly generated mana to bounce Myr Enforcer right back to your hand, resetting the cost for you to cast it all over again and keep the cycle spinning infinitely.