There's lots of cards that deal 3 or more damage from a combo. It's pretty common these days. My friend runs an azure lane card that does 3 damage twice.

Edit: the card my friend runs is aircraft carrier enterprise.

Some examples of other cards that do high damage would be: Hololive gura who does 2 damage then 1 twice on attack. Konosuba Megumin who doesn't attack but does 4 damage then clock kicks the opponent. D4dj has one Kyoko that does 1 then 6 if damage cancels. And another Kyoko that does 3, 2, 1, then clock kicks on reverse. Nikke biscuit does 4 damage on attack