Oracle

Land 

T: Add one mana of any color. An opponent gains control of Rainbow Vale at the beginning of the next end step.

Tournooi-info

Legal in: Vintage, Legacy, Commander

Officiele rulings

10/4/2004
Only changes controller at the end of a turn in which it was tapped for mana. It does not change controller if it is not tapped for mana.

10/4/2004
Stays in the same tapped/untapped state it is in when it switches controllers.

9/16/2007
If control of Rainbow Vale has somehow changed before the “at end of turn” ability resolves, the player who activated the mana ability (not the current controller of Rainbow Vale) chooses one of their opponents to gain control of it.

9/16/2007
If Rainbow Vale’s ability is activated during an End step, its “at the beginning of the end step” trigger won’t trigger until the End step of the next turn. If its ability is activated again during that turn, its “at the beginning of the end step” ability will trigger twice at the End step of that turn.

9/16/2007
If more than one player manages to tap it for mana in a given turn, then two control-change abilities will trigger at end of the turn. These abilities resolve using the standard order for such things, so the active player’s triggers are put on the stack first, then the opponents’.

9/16/2007
The opponent is chosen when the “at end of turn” triggered ability resolves.

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