Ready // Willing

If you're casting a split card with fuse from any zone other than your hand, you can't cast both halves. You'll only be able to cast one half or the other.

If you cast a split card with fuse from your hand without paying its mana cost, you can choose to use its fuse ability and cast both halves without paying their mana costs.

To cast a fused split spell, pay both of its mana costs. While the spell is on the stack, its mana value is the total amount of mana in both costs.

When a fused split spell resolves, follow the instructions of the left half first, then the instructions on the right half.

Some split cards with fuse have two monocolor halves of different colors. If such a card is cast as a fused split spell, the resulting spell is multicolored. If only one half is cast, the spell is the color of that half. While not on the stack, such a card is multicolored.

A creature that comes under your control after Willing resolves won't have deathtouch or lifelink, because adding abilities does change a creature's characteristics.

Multiple instances of deathtouch or lifelink are redundant.

You can choose the same object as the target of each half of a fused split spell, if appropriate.

On the stack, a split spell that hasn't been fused has only that half's characteristics and mana value. The other half is treated as though it didn't exist.