im just going to put this out here there should be a revive item for either the player or summon but it gives a buff after death
maybe the player revives with half health and for the remaining round can only use 30% of their cards and the cards are buffed but slightly. it would also be a one use before being completely removed from your deck. the card itself would do nothing tho and has to be in either your hand or the draw pile to work
just an idea