Provoke

Provoke is a keyword ability on creatures that allows a player to, during their declare attackers step, untap a creature the defending player controls and require that creature to block the attacking creature with provoke. The block must still be legal, e.g. a non-flying creature cannot block a flying creature even when Provoke is used on it.

History
Tournament-legal cards with provoke were first printed in Legions. All the provoke creatures in that set have a hook element in their art. Aside of Legions, the un-card Greater Morphling is the only other card printed with Provoke, though a card named Provoke, with an ability similar to provoke, appeared in Stronghold.

The introduction of the similar Fight mechanic made the return of Provoke unlikely.

Rulings

 * There's no requirement for the provoked creature to be tapped or to be able to block.
 * You can choose not to force the creature to block, in which case it won't untap.
 * If the provoked creature becomes tapped before the declare blockers step, it won't be able to block.
 * If a creature is provoked by more than one creature, the controller of the provoked creature chooses which one it blocks.
 * If the provoked creature has any costs to block, those costs don't have to be paid. If the costs are paid, the provoked creature must block the creature with provoke.

Creature that grants Provoke

 * Hunter Sliver (all Slivers)

Provoke cards before the keyword ability

 * Crashing Boars from Exodus
 * Provoke from Stronghold