Solution for Seasons

Make all nature blocks cyclical & add an easy process to convert those blocks to a static season type. Nature blocks continue thier cycle when placed--unless converted. Make seasons effects on the world impermanent & ingame toggleable seasons

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(Season Alter) These would spawn throughout the world at the base of huge tree structures. They're craftable using any Season Tome & a Crafting Table. With its Recipe leaned upon contact with an alter

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The base of the alter is like a stone cutter but it makes static seasonal blocks. "Oak leaves" into "Summer Oak Leaves". These blocks stay the same regardless of season

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(Seasonal Tome) Place one of 4 Tomes atop any alter & change the world to that season indefinitely. If a Tome is on the Alter, right click to close it, this stops seasons entirely. Find Tomes as loot or make them at an Alter

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By default, all Alters start empty. Any placed Tome appears on all. Taking the Tome off will destroy the Tome on all & drop only to the taking player & the world returns to it's normal cycle

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Tempature Mobs spawn everywhere & fluctuate based on weather & season

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Crops drop more/less when in season

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In Winter, snow piles up & caps at layer 7, they melt in spring so no new blocks are made. There's Snow logging too!

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Weather: maybe local now too

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Thunder Storms: Everywhere except Winterlocked biomes, with BIG clouds. Duststorm: Deserts only. Snowstorm: Occasionally appear in other biomes during winter.

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Maybe add Ruby/Sapphire amulets that negate cold/hot effects