mtg modern horizons 3 cards [MH3] Bundle (A regular Art card can be found in 30% of packs and a foil A First Look at Modern

This is key, as Grolnok's controller is capable of casting spells and playing lands from exile as long as they have croak counters on them

Not only that, you can beef it up with [casthaven]Nyx Infusion[/casthaven] and hit for some real damage

That said, a clear smartphone photo taken in good lighting usually works well

Emblem Garruk Whenever a creature attacks you, it gets +5/+5 and gains trample until end of turn

Death's Shadow, Impervious Greatwurm, Lord of Extinction, Titanoth Rex, and Yargle and Multani are your main targets to remove for counters on Mimeoplasm, so these are 7 cards that should definitely be staying