Alistair, the Brigadier 
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Legendary Creature - Human Soldier
Whenever you cast a historic spell, create a 1/1 white Soldier creature token. (Artifacts, legendaries, and Sagas are historic.)
Whenever Alistair attacks, you may pay
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. If you do, creatures you control get +X/+X until end of turn, where X is the number of historic permanents you control.
3/3