Master Yi - Unstoppable

[Level 3][>] I cost 2Calm Rune less. (While you have 3+ XP, get the effect.) [Level 6][>] I cost 4Calm RuneCalm Rune less instead. [Level 11][>] I cost 6Calm RuneCalm RuneCalm Rune less instead. [Level 16][>] I can't be chosen by enemy spells and abilities.