Well, since you are using Monster, RotaryCraft has a Terraformer that can change biomes, including blocks present. Bit expensive and endgame, though.
Blood Magic has a ritual that can shift biome heat/humidity and thus change the biome, but it's a ritual, so it may be a ways off... And Blood Magic is disabled by default, but it's safe to enable.
And there is also Witchery. May not be up to date(and I kinda doubt it is), but there is a Rite or two that can do that. Not early game either. Not late game, though. Sorta... early-mid-game.