You take a drink from your tincture of yabathilium.
Nothing happens.
[Because your account is free, you cannot use this spell.]
That was the last drop.
You set the yabathilium aside.

Is this intentional? Because it's annoying, especially since it wastes the potion. Doubly so when you have a poison that could kill you that you're planning to deal with using the yabathilium tinctures your alchemist friend gave you.

I'll take a peek at this.

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~Wyrom, APM

>>They call him Wyrom, not afraid to get dirty; work all day, in game by 5:30; loresongs eloquent, item embellishment, double speed development... ~Silvean