Fervor

Enchantment    (CMC:3)

All creatures you control are unaffected by summoning sickness.

"If your blood doesn't run hot, I will make it run in the sands" —Maraxus of Keld

WL • ENFranz Vohwinkel

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Legal in: Modern,Mirage Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Singleton 100,Commander

Oracle Text (click to copy):

7/1/2012
If an attacking creature loses haste, perhaps because Fervor leaves the battlefield after attackers have been declared, it won't be removed from combat.