Dome Crushers

From BoardGameGeek:

Dome Crushers is a tiny two-player card game of titanic arena battles in which players take turns playing cards, then choosing attack mode or ability mode. Attackers are removed from your deck and count toward your end-game score if you are the winner. All remaining cards are shuffled back in, then another round begins. The game ends when either player cannot draw four cards. The player with the highest strength total in their scoring pile is the winner!