Bound // Determined

Each split card has two names. If an effect instructs you to choose a card name, you may choose one of those names, but not both.

Split cards have two card faces on a single card. The characteristics of the half you didn't cast are ignored while the spell is on the stack.

If you copy a spell that's half of a split card, the copy copies that same half. For example, if you copy Assault, the copy is also Assault, not Battery.

The cards in the graveyard that you return as part of Bound's effect aren't targeted. They're chosen when the spell resolves. The creature you sacrificed may be one of them.

After Determined resolves, any spells or abilities that would counter a spell you control that turn will still resolve. They just won't counter that spell.

The creature is sacrificed when Bound resolves. It's not an additional cost. It's not optional. If you can't sacrifice a creature or a colorless creature is sacrificed, no cards are returned.

Spells you control may be countered by spells or abilities while Determined is on the stack, waiting to resolve.