Ricochet Trap — ruling 1

If you cast Ricochet Trap for {R}, you don’t have to target the blue spell an opponent cast.

Ricochet Trap — ruling 2

Ricochet Trap targets only the spell whose target will be changed. It doesn’t directly affect the original target of that spell or the new target of that spell.

Ricochet Trap — ruling 3

You don’t choose the new target for the spell until Ricochet Trap resolves. You must change the target if possible. However, you can’t change the target to an illegal target. If there are no legal targets to choose from, the target isn’t changed. It doesn’t matter if the original target of that spell has somehow become illegal itself.

Ricochet Trap — ruling 4

If you cast Ricochet Trap targeting a spell that targets a spell on the stack (like Cancel does, for example), you can’t change that spell’s target to itself. You can, however, change that spell’s target to Ricochet Trap. If you do, that spell won’t resolve when it tries to resolve because Ricochet Trap will have left the stack by then.

Ricochet Trap — ruling 5

If a spell targets multiple things, you can’t target it with Ricochet Trap, even if all but one of those targets have become illegal.

Ricochet Trap — ruling 6

If a spell targets the same player or object multiple times, you can’t target it with Ricochet Trap.

Ricochet Trap : règles, fonctionnement et interactions (MTG)

Ricochet Trap is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

If an opponent cast a blue spell this turn, you may pay rather than pay this spell's mana cost. Change the target of target spell with a single target.

How it works : Ricochet Trap

Original English text — Wizards of the Coast / Scryfall

#1March 1, 2010· Wizards of the Coast
If you cast Ricochet Trap for , you don’t have to target the blue spell an opponent cast.
No other card is named in this ruling.
#2March 1, 2010· Wizards of the Coast
Ricochet Trap targets only the spell whose target will be changed. It doesn’t directly affect the original target of that spell or the new target of that spell.
No other card is named in this ruling.
#3March 1, 2010· Wizards of the Coast
You don’t choose the new target for the spell until Ricochet Trap resolves. You must change the target if possible. However, you can’t change the target to an illegal target. If there are no legal targets to choose from, the target isn’t changed. It doesn’t matter if the original target of that spell has somehow become illegal itself.
No other card is named in this ruling.
#4March 1, 2010· Wizards of the Coast
If you cast Ricochet Trap targeting a spell that targets a spell on the stack (like Cancel does, for example), you can’t change that spell’s target to itself. You can, however, change that spell’s target to Ricochet Trap. If you do, that spell won’t resolve when it tries to resolve because Ricochet Trap will have left the stack by then.
No other card is named in this ruling.
#5March 1, 2010· Wizards of the Coast
If a spell targets multiple things, you can’t target it with Ricochet Trap, even if all but one of those targets have become illegal.
No other card is named in this ruling.
#6March 1, 2010· Wizards of the Coast
If a spell targets the same player or object multiple times, you can’t target it with Ricochet Trap.
No other card is named in this ruling.