Passive: when a monster's skill hits you, you learn it. You keep only one, the latest. It counts even if your Illusion Shell blocks it. Boss skills can't be learned.
Press: you keep the learned skill for 10 minutes, and the key becomes that skill. Cast it as often as you like, with the monster skill's cooldown.
Damage: 90% of the monster skill's power, +10% per level, with your magic attack. Element of the skill.
Hits your target or the nearest enemy within 9 tiles. Costs no SP without a learned skill or without enemies.