You even get to ramp with each successful attack of an Incubator token, snowballing your transformation mana sink even further
The Accomplice actually costs one less to get rolling, is more fragile as a creature than an enchantment, but should still be able to get off an activation assuming you have four mana available the turn you cast it
At the very bottom, featuring the younger SOLDIER featuring in Ever Crisis, before rising up to the form we know and love, before featuring his final Safer-Sephiroth form on the other side as Sephiroth, One-Winged Angel'
Five mana isnt a great rate for one counter on everything (I mean, thats what Cathars Crusade costs and you never need to pay anything beyond that for way more counters), but go-wide payoffs are limited outside of green, and if youre furiously flickering enough that you have an army of tokens, it wont take much for those tokens to become a real threat
Shiko and Narset, Unified One generic, one blue, one red, one white legendary creature - Human Spirit Dragon - 4/4 - Mythic Rare Flying, vigilance Flurry - Whenever you cast your second spell each turn, copy that spell if it targets a permanent or player, and you may choose new targets for the copy
Invigorating Hot Spring is an incredible enchantment and gives similar enchantments like Rhythm of the Wild a run for its money