Jungle Abomination

The Jungle Abomination is a boss mob from one of Minecraft Dungeons' DLCs. It is a boss mob that lives in Jungles. It can summon walls of moss and will throw logs at the player with its vine-tentacle-arm-hand-thingy (that's the scientific term BTW) .

If a player sets fire to one of every tree type, they will be given a Deforestation effect, that works similarly to Bad Omen. If the player has this effect and walks into a Jungle Temple (or another jungle-related summoning site), the JA will rise and attack the player. The JA takes double damage from any fire attacks and it will drop a Heart of the Jungle when killed.

Crafting a Heart of the Jungle with 8 cocoa beans around it will give the player a Jungle Conduit, called the Underbrush. You can power the Underbrush with Mossy Cobblestone. While within the Underbrush's range, all tree types will grow faster and larger.

I think this makes sense: You burn trees and anger the JA, you then kill it and harness its plant power to grow more trees.