Crashing Drawbridge

Defender
{T}: Creatures you control gain haste until end of turn.

Faithless Looting

Draw two cards, then discard two cards.
Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Create a token that's a copy of target creature, except it has haste and "At the beginning of the end step, exile this permanent."

Flash
When Dualcaster Mage enters, copy target instant or sorcery spell. You may choose new targets for the copy.