This works very well with the Gearhulk cycle, with Solemn Simulacrum, modular creatures, good old cards like Wurmcoil Engine and Myr Battlesphere the list goes on and on
You attack with this card, it has the must be blocked ability, and a lot of times it will eat a smaller creature and trade
He really likes the "value" creatures in Blue and Green, notably Stickytongue Sentinel, Long River Lurker, Bakersbane Duo, and Skyskipper Duo - basically any card that provides an extra piece of value that can be flickered
While its expensive to cast, activating its monstrosity ability gives you a token copy of it
Despite this, the card still sees a healthy amount of Pioneer play in sacrifice strategies and occasionally pops up in Duel Commander and cEDH
They may choose a dungeon that they have already completed this game