Using a custom potion with a high amplifier e.g. 255, the amplifier is lost when the potion is drunk. E.g.
\give @p minecraft:potion 1 0 {CustomPotionEffects:[{Id:25,Amplifier:255,Duration:20}]}
Gives a potion which gives levitation 255 (hovering). However upon consuming the potion, the level 1 (amplifier 0) effect is applied which raises the player instead of holding them steady.
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Skylinerw
migrated
Duplicate of MC-10755.
As well, the
Amplifiertag is read a signed byte (-128 to 127). You should not be going outside the expected value range. 255 is outside that range and overflows to -1. However, in 1.11, amplifiers lower than 0 will be seen as 0.