u/Available-Drawer-925

My Nether fish series teaser

The one at the left bottom is Wind Wizard from Clash Mini

Oxygen tank can be crafted with 6 irons, a redstone dust and a bucket. It can be refilled by placing on a air column created by either megma blocks or soul sands.

Once fully refilled with air, the oxygen tank can give player 20 minutes of respiration III effect, similar to the armor one. It can aslo give players at max 3 potion effects when filled with lingering potions, each potion refill also last 20 minutes. However, as a trade-off, oxygen tanks function as chestplate armors and grant 0 armor protection.

Made some slight adjustments based the comments on r/Minecraft