Tasha's Terrible Toads

You conjure a swarm of 3 mystical Giant Frogs for 3 rounds. The Giant Frogs is friendly to you and your team and obeys your commands, moving and taking actions on your turn. The Giant Frogs can only move or be dispelled which takes no action from the caster. At the end of the three rounds, all the Giant Frogs explode. If a Giant Frog dies or is dispelled, then it will explode dealing 2d10 acid damage and leave a puddle of poisonous puddle that covers a 10ft radius around the Giant Frog, and creatures that start or end their turn in the poison must make a Constitution Save with a DC equal to your spell save DC, taking 3d6 poison damage on a failure and giving them the poisoned status, they take half the damage they normally would. 

When you cast this spell using a spell slot of 5th level or higher, you can summon an additional frog for each spell level above second.