New player here and I'm confused about how this works. Any help would be appreciated.
Playing a campaign and we encounter Strahd from Curse of Strahd. The party tries to retreat to sunlight. One member moving away from Strahd provokes an opportunity attack and the DM says he uses an unarmed strike and grapples them. On that player's next turn, they break free from the grapple and attempt to move away. Again, AoO and grappled.
Is this working as intended? Can Strahd use his special Unarmed Strike to grapple as an opportunity attack?
I believe that anything listed under "Actions" can't be used as an opportunity attack. But the DM says AoO allow one melee attack and they believe since Unarmed Strike is a type of melee attack it can be used.
Here is the relevant section of Strahd's statblock:
Unarmed Strike (Vampire Form Only). Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) bludgeoning damage plus 14 (4d6) necrotic damage. If the target is a creature, Strahd can grapple it (escape DC 18) instead of dealing the bludgeoning damage.