If you choose to cast it, you must do so right away
Goldin's recent auction also included a rare uncut sheet of first-edition Pokmon cards, including all 16 holographic cards from the game's earliest Base Set as well as two shadowless Charizards, that sold for $171,600.
You've got good mana fixing with Ignoble Hierarch , Rampant Growth , and the full set of Talismans , you have a decent suite of answer cards like Maelstrom Pulse and Terminate , card draw from things like Syphon Mind and Deathreap Ritual , and significant threats in the form of Broodmate Tyrant and Archon of Cruelty
So, Gruul Spellbreaker could be a 4/4, or it can swing right away as a 3/3
But it lacks haste and vigilance so it cannot swing the turn it arrives or hold back after it swings, so your milage may vary