Voyage to the Sunken City Cards List & Guide
Add three 1/1 PiranhaSwarmers to your hand.
A group of Piranha are known as a Scholomance.
Mistermath's Card Ratings for Voyage to the Sunken City:
The flexibility of splitting 1+2+3 damage, as well as the flexibility of spreading out the piranhas, and additionally the synergy with other piranha cards and the token-lovers in shaman make this card quite reasonable. The card I actually first compared it to was Fireball, since it deals a total of 6 damage for 4 mana if all the piranhas are played immediately. However, upon closer inspection, it's a closer comparison to Multi-Shot, which Schooling clearly beats out in basically every category.
This is the best piranha swarmer card; you'll get a 1, 2 and 3 attack rush for 3 mana.
Still not good though.