Commander 2011

Nemesis Trap

If a white creature is attacking, you may pay {B}{B} rather than pay Nemesis Trap's mana cost.
Exile target attacking creature. Put a token that's a copy of that creature onto the battlefield. Exile it at the beginning of the next end step.

If a white creature is attacking, you may pay {B}{B} rather than pay this spell's mana cost.
Exile target attacking creature. Create a token that's a copy of that creature. Exile it at the beginning of the next end step.

Worldwake

If a white creature is attacking, you may pay {B}{B} rather than pay Nemesis Trap's mana cost.
Exile target attacking creature. Put a creature token that's a copy of that creature onto the battlefield. Exile it at the beginning of the next end step.