Lvl. 6: Crowd Pleaser (uuu) - Does 1/2 damage of total cost to 3 monsters (regardless of their type).
Lvl. 9: Crossfire (uu<3) - Attack with both u regardless of the monster's base. For the duration of the battle, whenever you attack, you may split the damage between two monsters of the same element.
Lvl. 12: () -
Lvl. 15: Incinerate (uuuu) - Destroy the active Base of 1 monster. Inflict 2 u on the remaining monsters.
Bonus Skills
Lvl. 4: Rocket Science (u^) - Create 1 (u2-8) or 2 (u9-K) Firecrackers, or 1 The Big One (uA).
Lvl. 7: Barrage (uu<3) - Use 3 rocket items at once. This includes Firecrackers, Spark Showers, The Big Ones, or Show Stoppers.
Lvl. 10: Finale (Au) - Draw six cards. If any of them can be effective against any of the monsters on the field, attack with them. Discard any cards that aren't used.
Ability Updates
Lvl. 5: Advanced Ether Gather - Can Hold 2 u from the hand per turn.
---Co-Op: Ether Gift - Your ally can now hold 2 u from the hand per turn.
Lvl. 10: Firepower - When attacking multiple monsters, you may add +1 damage to each target involved in your attack.
Lvl. 15: Firestorm - Increase the bonus from the previous update to +3.