Plant a brain bush seedling. It will eventually mature into a forest of brain bushes.
Attributes:
None
Upgrades:
6 - Psychic Fields
Plant 5 seedlings instead of 1
8 - Immortal Forest
Grow an Immortal Seedling instead of a normal one.
4 - Parasitic Growth
May target an enemy instead of an empty tile. Targeted enemy takes 1 arcane damage per turn for 10 turns. If the enemy dies, if it had 40 or more max hp, spawn a brain tree where it died.