Multiattack

The roper makes up to four tendril attacks then uses Reel then attacks with its bite.

Tendril

Melee Weapon Attack: +7 to hit, reach 50 ft., one target. Hit: The target is grappled (escape DC 15). Until this grapple ends the target is restrained and the roper can't use this tendril on another target.

Reel

The roper pulls each creature it is grappling up to 25 feet straight towards it.

Bite

Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) piercing damage plus 9 (2d8) acid damage.