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If an ability would produce one or more mana of an undefined type, it produces no mana instead.

Some abilities produce mana based on the type of mana another permanent or permanents “could produce.” The type of mana a permanent could produce at any time includes any type of mana that an ability of that permanent would produce if the ability were to resolve at that time, taking into account any applicable replacement effects in any possible order. Ignore whether any costs of the ability could or could not be paid. If that permanent wouldn’t produce any mana under these conditions, or no type of mana can be defined this way, there’s no type of mana it could produce.

To “tap [a permanent] for mana” is to activate a mana ability of that permanent that includes the {T} symbol in its activation cost. See rule 605, “Mana Abilities.”

An ability that triggers whenever a permanent “is tapped for mana” or is tapped for mana of a specified type triggers whenever such a mana ability resolves and produces mana or the specified type of mana.

A replacement effect that applies if a permanent “is tapped for mana” or tapped for mana of a specific type and/or amount modifies the mana production event while such an ability is resolving and producing mana or the specified type and/or amount of mana.

If an object’s enters-the-battlefield triggered ability or replacement effect refers to X, and the spell that became that object as it resolved had a value of X chosen for any of its costs, the value of X for that ability is the same as the value of X for that spell, although the value of X for that permanent is 0. This is an exception to rule 107.3i.

The tap symbol is {T}. The tap symbol in an activation cost means “Tap this permanent.” A permanent that’s already tapped can’t be tapped again to pay the cost. A creature’s activated ability with the tap symbol in its activation cost can’t be activated unless the creature has been under its controller’s control continuously since their most recent turn began. See rule 302.6.

The untap symbol is {Q}. The untap symbol in an activation cost means “Untap this permanent.” A permanent that’s already untapped can’t be untapped again to pay the cost. A creature’s activated ability with the untap symbol in its activation cost can’t be activated unless the creature has been under its controller’s control continuously since their most recent turn began. See rule 302.6.

In a two-player game, you exchange control of two permanents of your choice with your opponent.

Inniaz’s ability triggers just once, no matter how many creatures with flying attack beyond the third.

The control-change effect of Inniaz’s last ability lasts indefinitely. It doesn’t wear off during the cleanup step, and it doesn’t expire if Inniaz leaves the battlefield. In a multiplayer game, a player who leaves the game takes back their permanent and gives back the one they took.

Inniaz’s ability resolves before blockers are chosen.

In a Two-Headed Giant game, Inniaz’s ability ignores who’s on which team. The leftmost player on each team gains control of a teammate’s permanent, and the rightmost player gains one from the opposing team’s leftmost player. If your teammate gains control of an attacking creature this way, it’s still removed from combat.

Inniaz’s ability resolves even if some or all of the attacking creatures lose flying or leave combat before it resolves.

You choose the permanents to be blown over to other players while Inniaz’s ability is resolving. No player may take actions between the time you make the choices and the time control changes.

If any player controls no nonland permanents, the player to their left doesn’t gain control of anything.

If you give away a creature you control with flying that attacked, it’s removed from combat. It will still be tapped if it was tapped, so it won’t be able to block.