Simple UHC

So, this datapack turns a normal minecraft world into a UHC. If you don't know what that is, then you can just go look it up to save us both some time. When you first join the world, open it to LAN. Then, once you have enough players, run "/trigger Start" to start the game. Everybody will start with a compass. The compass points towards zero zero, and if you hold the compass, you'll face towards the nearest other player. If you lose your compass, then you'll slowly die, so please don't do that.

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Random list of stuff

• Breaking a log breaks all the other logs
• Golden apples use four gold ingots instead of eight
• Breaking an ore drops its corresponding ingot (if there is one)
• You instantly pick up items when you mine blocks
• Leaves always drop, and they drop apples more than normal
• You have constant night vision
• You can craft a "compass apple" out of a compass and a golden apple. This is basically a golden head, but eating a head is gross, so eat a compass apple instead.

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There's five phases.
In the first phase, you're pretty much invincible. This is before PVP enables.
When that happens, you're not invincible anymore. That's the second phase.
At the start of the third phase, the border shrinks. If one of your coordinates is higher than whatever the border shrinks to, then you DIE.
In the fourth phase, any block above any player breaks. This is so that you can't hide in the sky or in the ground.
In the fifth phase, the border shrinks even smaller. Once again, if you're too far away from zero zero, you DIE.

Once there's only one player alive, they win. Nothing special happens when the game ends, you just win.