Conjure Wharwog

You summon the Wharwog, which appears in an unoccupied space that you can see within range. The creature disappears when it drops to 0 hit points or if it is dispelled.

When the Wharwog appears, it is under no compulsion to behave in any particular way. You can ask the creature to help, but it isn’t obliged to do so. The requested task could range from simple (help us fight a battle) to complex (protect us during our foray into the dungeon). You must be able to communicate with the creature to bargain for its help. If you are unable to communicate with the Wharwog it will likely respond hostilely to you. Extreme caution should be taken. 

The GM has the creature's statistics.