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.
In Two-Headed Giant, triggers only once per upkeep, not once for each player.
2004-12-01
wotc
Remember which player would have taken the next turn if Timesifter's ability hadn't triggered the first time. After Timesifter leaves the battlefield and all extra turns have been taken, that player takes the next turn.
2004-12-01
wotc
If two or more Timesifters are on the battlefield, keep a careful record of which players get which extra turns. With two Timesifters on the battlefield, two extra turns are created for each turn taken.
2004-12-01
wotc
If multiple extra turns are created in a game, the most recently created extra turn is taken first.
2004-12-01
wotc
If a player fails to exile a card, they can't take the extra turn.
2004-12-01
wotc
Each time there's a tie for the highest cost, only the players involved in the tie continue.
2004-12-01
wotc
Each player must exile the top card of their library at the start of each upkeep step.
2004-12-01
wotc
A land card has a mana value of 0.
Format Legality
Standard
Not Legal
Future
Not Legal
Historic
Not Legal
Timeless
Not Legal
Gladiator
Not Legal
Pioneer
Not Legal
Modern
Legal
Legacy
Legal
Pauper
Not Legal
Vintage
Legal
Penny
Legal
Commander
Legal
Oathbreaker
Legal
Standardbrawl
Not Legal
Brawl
Not Legal
Alchemy
Not Legal
Paupercommander
Not Legal
Duel
Legal
Oldschool
Not Legal
Premodern
Not Legal
Predh
Legal
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