Minecraft wiki entry for Conduit_Power, associated text: Conduit Power I has an identical Haste effect as Haste I‌[JE only] / Haste II‌[BE only]. Conduit Power X has an identical haste effect as Haste X‌[JE only]. The levels of Water Breathing and Night Vision are unchanged by the level of Conduit Power. Conduit Power and Haste do not stack; the higher level effect is applied.