Card sounds may differ from in-game as they get updated.
Endurance - Units with Endurance ready at the start of each players turn, so they can attack and still be ready to block during the enemy turn. Additionally, they are completely immune to enemy stun and exhaust effects.
Summon - Does something when played
Scout - Look at the top card of your deck. You may put it on the bottom.
Shift - When played, you may instead pay the Shift cost. Shifted units can't attack, block, or be selected until they emerge.
Emerge - After three turns, Shifted units emerge and get Unblockable that turn.