Its a decently powerful card that can wipe out a bunch of weak creatures at once and grows stronger whenever an enemy creature dies, though it doesnt exactly make for a top-tier commander
Relive the Past Relive the Past needs to be in a deck capable of returning all three card types to play
Filled to the brim with cantrips, draw spells, burn spells, and everything else in between, Spellslinger decks reward you for casting as many spells as you can in a turn, generating some amount of value while doing so
Goal here is to get the game over before two spare mana is available
This provides a more powerful effect, gains them more resources or denies the opponent vital information - all likely worth the extra mana if it can be spared
Though Modern is technically supposed to be an eternal, non-rotating format, that hasnt exactly been the case in the past few years