While doing Alistar Combo, people usually does W + Q + E to do said combo.
But, if you manage to do an Alistar combo with E before Q (W + E + Q), his E will be bugged and it will get triggered every time Alistar uses W
1) Upgrade the 3 skills (doesnt matter the level)
2) Perform the combo W + E + Q
3) Let E and W get off cooldown
4) Use W on something
5) E will trigger 100% of the times if you have enough mana
Like it says in step 5, it will not trigger if you dont have enough mana to trigger E (even if you dont want to)
Youll be able to use E anytime, but if you use W, it will trigger E at the time W animation ends.