The Ibistick

Mysterious Artifact is a piece of Epic (4-star) gear that can be evolved into a Legendary (5-star) gear, The Ibistick.

Effects
10% - 30% DAMAGE BOOST to special 1 10% - 30% DAMAGE BOOST to special 2 10% - 20% POWER GENERATION increase [EVOLVED] 5% - 10% damage DOT added on special

The DOT is based on your opponent's maximum health, regardless of tapping/swiping, blocking, or anything else. When freshly evolved using a special (not super) burns 1% of enemy maximum health every second for 5 seconds. Its damage is not affected by Batman Returns Catwoman, or any other damage boost other than bleed, but the burning will trigger silver and bronze Catwoman's passives. They also seems to have fixed bleed's own damage bonus towards other damage over time, which would now have their damage increase by 20% per stack of bleed.

The burn will be applied to the opponent present at the end of the special, even if they haven't actually been hit by the special. This means you can knock out an opponent with the last hit and still burn the next opponent that tags in.

Harley Quinn's special 2, regardless of which item you pick, will apply the burning as normal. However, Aquaman/Prime's Atlantean Hero will not apply burning on use.

If you use Harley's s2 while your opponent is already burning, the damage over time will be converted to deal yellow (special) damage (normal burns are unaffected and will continue to deal white damage). Additionally, as it is possible to block during enemy Harley's s2, Static will gain power as if he blocked an s2 (1 full bar of power) and Wonder Woman/Regime will gain a small amount of power for every hit of the damage over time she "blocked" despite that damage is not actually reduced.