Even though it doesnt have haste, like Mistcutter Hydra or Gaeas Revenge, its so big and robust of a threat, and for such an efficient cost, I would expect well see a lot of it
Its a phenomenal way to take a player off a fast start from mana rocks, and it yoinks engine artifacts in the late-game
Whispers of the Muse (T1, Ext, S, Block) A favorite in "Turbo Xerox" (a blue deck which used minimal land but a ton of cantrips to thin out the deck), Counter-Phoenix (Shard Phoenix + Forbid) and Tradewind-Awakening (put Awakening on the stack, tap all your lands for mana, untap all your lands), Whispers has what might seem like a hefty price to pay for one card but you get to do it turn after turn after turn
Questing Druid Marcy: A pretty solid card that can play into a few interesting color combinations, not just R/G, although I think this card does absolutely fine just in those colors