Armed // Dangerous

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.

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.

If a player names a card, the player may name either half of a split card, but not both. A split card has the chosen name if one of its two names matches the chosen name.

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.

As blockers are declared, any creature that’s tapped or affected by a spell or ability that says it can’t block doesn’t block. If there’s a cost associated with having the creature block, no player is forced to pay that cost, so it doesn’t block if that cost isn’t paid.

Dangerous doesn’t give any creatures the ability to block the target creature. It just forces those creatures that are already able to block the creature to do so.