Ricin

 is a Tier 5 Tank that upgrades from Package Bomb and Acid Trapper at level 60.

Design
The looks like Package Bomb but its gray tip barrel becomes  green. It also gains the same Acid indicator as Acid Trapper, as well as its green glow. Its traps gain an Acid-colored circle atop them, and their spikes also become green.

Technical
The 's traps act like Package Bomb traps, but both the traps themselves and their explosions can inflict Acid.