Foundry Hornet

Creature — Insect    (CMC:4)

Flying When Foundry Hornet enters the battlefield, if you control a creature with a +1/+1 counter on it, creatures your opponents control get -1/-1 until end of turn.

Its buzzing is easily mistaken for the hum of a thopter's wings.

059 AER • ENChristopher Moeller

™ & © 1993— Wizards of the Coast

Notes: TODO: Update Copyright

Legal in: Modern,Legacy,Vintage,Commander

Oracle Text (click to copy):

Foundry Hornet {3}{B} Creature — Insect Flying When Foundry Hornet enters the battlefield, if you control a creature with a +1/+1 counter on it, creatures your opponents control get -1/-1 until end of turn. 2/3

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View this MTG card on Gatherer

2/9/2017
The set of creatures affected by Foundry Hornet’s triggered ability is determined as the ability resolves. Creatures opponents begin to control later in the turn and permanents opponents control that become creatures later in the turn won’t get -1/-1. The effect continues until end of turn even if you stop controlling a creature with a +1/+1 counter on it.
2/9/2017
If you don’t control a creature with a +1/+1 counter as Foundry Hornet enters the battlefield, its ability doesn’t trigger, even if you can give a +1/+1 counter to a creature right away. If you control no creatures with a +1/+1 counter as the ability resolves, nothing happens.
2/9/2017
If an effect causes Foundry Hornet to enter the battlefield with a +1/+1 counter on it, it satisfies its own triggered ability.

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Card Foundry Hornet is not on TCGPlayer.