If, during your declare attackers step, a creature that must attack if able is tapped, is affected by a spell or ability that says it can't attack, or hasn't been under your control continuously since the turn began (and doesn't have haste), then it doesn't attack. If there's a cost associated with having a creature attack, you're not forced to pay that cost, so it doesn't have to attack in that case either.
The number of attacking Goblins is counted as the last ability resolves, and the bonus is locked in at that time.
Although Goblin Rabblemaster doesn't force itself to attack, if you control two of them, they'll force each other to attack if able.
This printing is one of 2 catalogued treatments from PRM — the lineup includes Foil alongside the standard finish. Across our catalog the Rarix library tracks every variant in the same family so collectors can compare price, scarcity and demand inside a single lineage.
Card #53832 of *Magic Online Promos*, the promotional run that shipped alongside the March 2015 Magic Online release.
Card type: Creature — Goblin Warrior, color identity red, printed at rare. Rares occupy the bottom-of-pack rare slot in standard boosters. Mana cost: {2}{R} (3 converted).
Legal across the major constructed formats — Modern, Legacy, Vintage, and Commander — plus Standard rotation play.
EDHrec ranks this card #4,389 in Commander, putting it in the niche-pick tier of the format's playable pool.
Illustrated by Zoltan Boros. Rarix catalogs 928 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Zoltan Boros
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
