Ok so I came up with a few that I thought would be cool.
Plasma Pill:A small pill which allows you to regenerate a small amount of blood (HP) each round.
Recipe:1 Soldier Pill, 1 Instant Ramen.
Cost:1000 gold and 1 gem.
Effect:Allows you to regenerate 4-15 HP each round for the next 5 rounds.
First Aid Kit:A complete ninja First Aid Kit, only used in emergencies.
Recipe:1 Soldier Pill, 1 Plasma Pill, 1 Cabbage, 1 Red Apple.
Cost:5000 gold and 3 gems.
Effect:Allows you to regenerate all of your HP during a battle.
Trap Bomb:A booby-trapped bomb, releases a flurry of kunai on explosion.
Recipe:1 Smoke Bomb, 5 Kunai.
Cost:500 gold.
Effect:Causes 15-30 damage on impact, plus another 10-15 damage a round for the next 2 rounds.
Wired Kunai:A kunai witha wire on it, used to immobilize enemies.
Recipe:1 Wire, 1 Kunai.
Cost:2000 gold.
Effect:Immobilizes your enemy for 1 turn.
Posioned Senbon:Senbon dipped in a deadly posion.
Recipe:2 Senbon, 1 Vile of Poison.
Cost:2 Gems.
Effect: Causes 2-10 damage on impact and 2-5 damage for the next 10 rounds.
I have other ideas, but I wanna see how people like these first.
Leave some feedback!