OneTimeItem
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TeamVK — Use an item ONCE! to execute any commands (as a player, console, op!) World/WorldGuard supported!
MythicTotem
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PQguanfang — Create BOSS spawn totem or bonus totem! - Unlimited size - ItemsAdder support.
MCJava
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jojodmo — Run Java Code from the Chat • Code plugins completely in-game • Beautiful Syntax Highlighting
BottleRecycling
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TeamVK — Useful for KitPvP!! You can get rid of the empty bottle/bowl after you drink the pot/soup.