So basically, I have made the basic molotov, but I want that the sphere expands when molotov hit ground and then disappears the same way. Now I have the sphere just “popping-up” and disappearing like for example grenade.
TL;DR:
How can I “spread the fire” or “sphere” actually.
When molotov collides with ground destroy actor and spawn “damage sphere”. In damage sphere you need create sphere trigger that damage player and create particle system with fire. That should help.