That activated ability can be absolutely criminal, whether you use it to finish someone off or just to bring them down a peg
Giving the creature +1/+1 is great too since, the lingering effects of Maximum Overdrive help scale your creatures higher and higher
I've even played Maze's End in Modern, which is fun but still fruitless (By the way, Wizards, Maze's End in War of the Spark or we riot, and no I don't care about the Vorthos flavor complaints
3 Realm Seekers In a very real way, this could have been the pseudo-replacement for Primeval Titan or Sylvan Primordial in your decks and hearts
Let me know in the Draftsim Discord, on Twitter, or in the comments below
All you have to do with Ghalta is find some way to get it into play as early as possible and suddenly your entire hand can be on the battlefield