Electrocute. The accumulator can move through a space as narrow as 1 inch wide without squeezing. A creature that touches the accumulator or hits it with a melee attack while within 5 feet of it takes 5 ( 1d10 ) lightning damage. In addition, the elemental can enter a hostile creature's space and stop there. The first time the accumulator enters a creature's space on a turn, that creature takes 13 ( 3d8 ) lightning damage. This damage is also applied to any creature that starts its turn in the same space as the accumulator.   Stormsheep. Metal armour makes any target particularly vulnerable to the accumulator. Take the AC total of the target provided from metal armor and subtract it from the target's AC.  This is the to-hit number the accumulator needs to hit. Give the accumulator advantage if the target is wielding a metal weapon to the elementals attack roll. If the accumulator is hit by a living creature wielding a metal weapon, electricity leaps from the accumulator, connecting with the attacker's outstretched limb. It burns the attacker who must make a DC 15 INT saving throw or suffer a stroke, loses 3d6 INT points and falls unconscious until some of the target's INT ability drain is healed.