You can pay at any time you could cast a sorcery to put your companion into your hand from outside the game
Pokmon TCG Pocket's friend system is appropriately basic for a series from the Nintendo school of online play: you add someone via their lengthy friend code and then can only interact with them either by viewing their profile and collection, having a private battle, or, from time to time, having five of their cards pop up in Wonder Picks
Emet-Selch, Unsundered / Hades, Sorcerer of Eld Emet-Selch, Unsundered represents free looting and the payoff of Hades, Sorcerer of Eld for double the threshold
it's especially good in Prismari decks
Predicting the next Magic bans can be a tricky business these days
Legality depends on the tournament format -- Peter Parker // Amazing Spider-Man can be legal in some formats and banned or restricted in others