In the next screen you may choose your summoner spells. Summoner spells allow you to assist your champion (or, in some cases, your teammate’s champion) in various ways. There are many spells to choose from; but choose wisely because you may only bring two of these into battle. Choose your Summoner Spells by clicking on one of the 'Spells' icons in the center of the screen, then clicking on the two Summoner Spells you wish to use.
Tip: Try to imagine which summoner abilities would be best suited to both your team and your champion. For example, if you are playing a support champion you may want to pick up the Heal spell for the synergy it offers with your champion’s existing abilities
GUIDES
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Varus,The Arrow of Retribution Champion Spotlight!