Master Yi - Unstoppable (059/219) [Unleashed]

[LEVEL 3] I cost 2 and 1 Calm less. <em>(While you have 3+ XP, get the effect.)</em>
<br>[LEVEL 6] I cost 4 and 2 Calm less instead.
<br>[LEVEL 11] I cost 6 and 3 Calm less instead.
<br>[LEVEL 16] I can't be chosen by enemy spells and abilities.