Its definitely a tedious ability, la Spore Frog loops, but were talking Gray Ogre with a 3-mana activated ability
Hollow Marauder is fantastic, but is best if you have enough creatures in the yard
As Persistent Marshstalker returns to the battlefield because of its triggered ability, you choose which player, planeswalker, or battle it's attacking
I would not like to tap this creature for the Exert benefit unless I really, really had to
Bringing in Ensnaring Bridge is nice, as all our lock pieces will be stressing their artifact removal spells heavily
Even within this limited pool of cards, there are a host of charming, flavorful nods to the Marvel Universe, like Doc Ock's 8/8 Power and Toughness and Pumpkin Bombs' use of Fuse counters (FYI: this is a counter we haven't seen in Magic since 2001, which is pretty cool in and of itself)