Other creatures you control have haste.
Whenever an opponent casts a creature or planeswalker spell with the same name as a card in their graveyard, that player loses 10 life.
2/25/2015 Casting a spell face down won’t cause Dragonlord Kolaghan’s last ability to trigger. A spell with no name can’t have the same name as any other card.
2/25/2015 If an opponent casts a creature spell with delve and exiles all cards from their graveyard with the same name to help pay its cost, Dragonlord Kolaghan’s ability won’t trigger.