Star Renegades

At the camp screen between days/planets, you have the option to play cards

You get health/armor, damage buffs, defense buffs, and companion levels.

At the second heart stage of a companion, you can unlock a combo attack. This is a special move, usable once a combat sequence, that requires the full turn of the duo using the attack.

Nodo the saboteur and Damian the paragon, for instance, will have an attack that can target any enemy, do moderate damage, and stun the enemy for one turn.

Keep in mind said attacks will also require fury, gained by accomplishing crits (attacks before an enemies movement) and for defeating foes.

Happy hunting (>*_*)>