A seriously messed up card game that is played by Tavros Nitram. It seems to be a combination of Pokémon and Alien.
The game seems to be played first with each player being dealt a hand of cards. A player can then throw an Oogonibomb which breaks open to hatch an Alien-esque face-hugger called a Fidusucker, which in turn then latches onto and impregnates a Host Plush. Another monster will then burst out of the plush. However, despite the Pokémon overtones, the actual goal of the game as Tavros plays it is to get the monsters to breed, presumably creating more Oogonibombs. How the cards and second player deal into this is anyone's guess, if Tavros's version is not in fact completely different from the way it's meant to be played.
Trolls sure are weird!