In a Two-Headed Giant game, gaining control of a player causes you to gain control of each player on that team
Unfortunately, this effect doesnt come cheap, as youll have to pay two mana for each card drawn this way
It's also one of the format's winningest decks, both in its T8 performance and in its MTGO finishes
Den of the Bugbear is custom-built as a mana sink for aggressive decks, generating two attackers, one of which has a potentially relevant creature type, for only four mana
As for its attack cost, it can be managed by cards like Terapagos, Crispin, Sparkling Crystal, Powerglass, or even Mirage Gate
Gain enough cards, and you can go through a tutorial to learn a simplified version of the card game to battle a random account online or take on a friend