701.65. Airbend

Subrules

Certain spells and abilities instruct a player to airbend one or more permanents and/or spells. To do so, that player exiles those objects. For each card exiled this way, for as long as it remains exiled, its owner may cast it by paying {2} rather than paying its mana cost.

An ability that triggers whenever a player airbends triggers when that player exiles one or more objects as a result of an instruction to airbend.

Other rules in this chapter

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The life counter has an AI judge that answers your play citing the exact rules. It is part of Gatewatch Pro; the rules, Oracle text and rulings stay free.