Nether Resin - a blast proof, transparent block

Nether Resin can be obtained by placing a cauldron under some crying obsidian. Once the cauldron is full, the liquid resin can be picked up with a bucket. By smelting the resin bucket in a furnace, you obtain a block of hardened Nether Resin. Hardened Nether Resin looks like glass with a slight purple tint. It can be crafted into panes the same way glass can. A block of hardened Nether Resin has the blast resistance of obsidian, while the panes will withstand a ghast but not a creeper.

The bucket of Nether Resin can be emptied into the terrain the same way you can empty a water or lava bucket into the terrain. It flows at the same speed as lava. When you fall into it, there's a chance of getting the poison effect. This chance rises to 100% if you're completely submerged. On top of that, you instantly get extra damage. The poison effect ends two seconds after exiting the resin.

If lava flows into a Nether Resin source block, the resin instantly turns into hardened Nether Resin. If Nether Resin flows into a lava source block, the lava turns into cying obsidian. If lava and resin flow into each other, blackstone generates at their meeting point.

If Nether Resin and water flow into each other in any constellation, a block of netherrack generates.

Liquid Nether Resin that gets placed in the Nether immediately hardens.