2.0.0-beta.5 for 1.21

• Added Ploy of Investiture and Ploy of Divestiture. (@enjarai)
• Changed Command Knot texture. (@enjarai)
• Fixed Echo Knots not syncing their mana contents to clients on dedicated servers. (@enjarai)
• Pushing mana into amethyst knots is now intended behaviour. (@enjarai)
• Fixed a bug causing Spell Constructs to lose their spell when broken. (@enjarai)