Tifa's Limit Break

If a mode requires a target, you can select that mode only if there's a legal target available. Ignore the targeting requirements for modes you don't choose.

To double a creature's power and toughness, that creature gets +X/+Y, where X is that creature's power and Y is that creature's toughness when Tifa's Limit Break resolves. To triple a creature's power, that creature gets +X/+Y, where X is twice that creature's power and Y is twice that creature's toughness when Tifa's Limit Break resolves.

If a spell with tiered is copied, the effect that creates the copy may allow you to choose new targets. You cannot choose a new mode.

The mana value of a spell with tiered is determined only by its mana cost (in the upper right corner of the card). It doesn't matter which mode you choose or which additional costs you pay, including any additional costs imposed by other effects.

You must choose exactly one of the listed modes and pay its associated additional cost in order to cast a spell with tiered.

You choose the mode as you cast the spell with tiered. Once the mode is chosen, it can't be changed.