Master Yi, Unstoppable

[Level 3][>] I cost :rb_energy_2::rb_rune_calm: less. (While you have 3+ XP, get the effect.)
[Level 6][>] I cost :rb_energy_4::rb_rune_calm::rb_rune_calm: less instead.
[Level 11][>] I cost :rb_energy_6::rb_rune_calm::rb_rune_calm::rb_rune_calm: less instead.
[Level 16][>] I can't be chosen by enemy spells and abilities.