When she spawns within The Grove, there will be an interactable tree in the middle of The Grove,[confirmation needed because of 3.14 change], and players must click the tree to begin the encounter.
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Previous Iterations[]
During the Harvest league, Oshabi would transform into her tree avatar - Heart of the Grove - after harvesting the first T4 seed. The Heart had a counter that went up to 100 and ticked up after each 'growth cycle' (seed cache being clicked) in a red (level 78+) map. When the counter reached 100, the tree she transformed into became interactable to start the boss fight.
Harvest did not go core after the Harvest league and was only reintroduced in Version 3.13.0 with major changes. In that version, the Heart of the Grove would sometimes replace normal Harvest encounters with a low probability.
As of Version 3.14.0, T4 Harvest monsters can drop a Sacred Blossom which creates a portal to the boss fight when used in the map device.
The Heart of the Grove encounter will no longer appear in place of a normal Harvest encounter. Instead, it can now be accessed through a Sacred Blossom map fragment that sometimes drops from Tier 4 Harvest bosses.
Harvest has been added to the core game and has been vastly reworked. It no longer contains a garden-building component, nor a permanent garden of your own. Instead, you now have a chance to discover a portal to an established Sacred Grove in maps, which contains several different harvestable plots.
On very rare occasions, you'll be able to harvest the Heart of the Grove and fight the Avatar of the Grove.
