The Large Bat (in-game name Suurlepakko) is a large flying bat that spawns in the Coal Pits.
The Suurlepakko summons bats, flinging them towards the player making them fill the role of projectile attack. The resulting Lepakko behaves exactly like normal once it hits or misses the player. The newly created Lepakko will drop Gold Nuggets, like their naturally spawned cousins.
The Suurlepakko will also lunge at enemies in its melee range similar to its smaller offspring.
Summoned Lepakko are considered projectiles until impact, and can be affected by Projectile Repulsion Field, Projectile Eater or Gravity Field.
This initial attack is far faster than the Lepakko's regular movement speed, but slightly slower than the normal Lepakko's dash attack.
It is unique in that it is one of only two enemies (the other being the Hiidenkivi) that attacks by summoning other enemies. While the Toimari also summons enemies, it only does so as a reaction to damage, not actively.