Heartbeat of Spring doesn't care about any restrictions or riders your lands put on the mana they produce, such as those of Jasmine Dragon Tea Shop and White Lotus Hideout
Thankfully, the mechanics of ex cards seem to be more balanced than the previous gen, encouraging new strategies that are fleshed out in the second expansion Paldea Evolved
Basic Energy vs Special Energy in 2026 Basic Energy: These are the nine fundamental Energy types (Grass, Fire, Water, Lightning, Psychic, Fighting, Darkness, Metal, and the now-discontinued Fairy)
Activate only as a sorcery. This ability triggers only once each turn
The Mega Evolution era might be when that all changes, as Phantasmal Flames has dropped more quickly than we'd expect