Siege of Yorktown

(As a Siege enters, choose an opponent to protect
it. You and others can attack it. When it’s
defeated, exile it, then cast it transformed.)
When this battle enters choose an opponent
who isn't protecting it, that player may create
three 1/1 white Soldier creature tokens, if they do,
Amass Rebels 3.

If a creature you don't control attacks this battle it
it gets +1/+0 until end of turn.