Time Weavers: Battle Mode - How to play

About Time Weavers, from BoardGameGeek:

Time Weavers is an epic fantasy adventure set across multiple time eras! Time Weavers is a 1-4 player board game that mixes elements of table top gaming and trading cards, which makes for a quick paced action packed game! When high school students, Kai, Isha, Eve and Braiden break an ancient artefact they accidentally unleash Elgar, a time travelling outlaw intent on collecting the Era Stones and controlling time! Now time is all jumbled and they find themselves in a world of medieval battles, dinosaurs, samurai and pirates! Choose your character and collect the Era Stones, then unite them on the shield to restore time! -description from the publisher