Ebony Fly

Some effects may modify the result of a die roll. This may be part of the instruction to roll a die or it may come from other cards. Anything that references the “result” of a die roll is looking for the result after these modifications. Anything that is looking for the “natural result” is looking for the number shown on the face of the die before these modifications.

You choose whether Ebony Fly becomes a creature as the second ability resolves, after you see the result of the die roll. If you don't choose to make it a creature at that time, you can't choose to make it a creature later in the turn unless you activate the ability again.

Dice used must have equally likely outcomes and the roll must be fair. Although physical dice are recommended, digital substitutes are allowed, provided they have the same number of equally likely outcomes as specified in the original roll instruction.