In a Two-Headed Giant game, if one player on a team loses the game, that team loses the game.
Mirrodin Besieged
If you support the Phyrexians, you must choose a target opponent as your end step begins. Whether that player loses the game is determined only as the ability resolves. This means that the card you discard may be the fifteenth artifact card that causes the target player to lose the game, but it also means that if there is no legal target opponent, you won’t draw or discard.
If you support the Mirrans, Mirrodin Besieged’s ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Bram Sels
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
