Gus, Leader of the Bloodsteppe

When Gus, Leader of the Bloodsteppe enters the battlefield, exile the top five cards from your
library, you may play any Hamster creature spells without paying their mana cost.
Other Hamster creatures you control have haste.
The Bloodsteppe-kind was in the verge of defeat at the
hands of Picu's Horde, until Gus appeared and with
his leadership drove them to victory.