Community
Timesifter
Artifact
At the beginning of each upkeep, each player exiles the top card of their library. The player who exiled the card with the greatest mana value takes an extra turn after this one. If two or more players' cards are tied for greatest, the tied players repeat this process until the tie is broken.
Rulings (8)
In Two-Headed Giant, triggers only once per upkeep, not once for each player.
May 1, 2006
If a player fails to exile a card, they can't take the extra turn.
Dec 1, 2004
Each time there's a tie for the highest cost, only the players involved in the tie continue.
Dec 1, 2004
Legality
Formats by platform