Gabrual, Queen of the Fools

Whenever a Rogue you control deals combat
damage to a player, that player discards a card
at random.
Whenever an opponent discards a creature card,
you may pay life equal to that card's converted
mana cost. If you do, put it onto the battlefield
under your control. It gains haste and becomes a
Rogue in addition to its other types.
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Make it worth your time.