Consume Life: As per this consume life trait the will-o’-wisp dnd 5e monster as a bonus action this will-o’-wisp able to target a creature that it is able to see within 5-feet of it which has 0 hit points and it is still be alive. Of course the target should be succeed on a DC10 Constitution saving throw which is against to this magic or die. Any how if the target dies, then the will-o’-wisp would be regain 10 (3d6) Hit Points.
Ephemeral: This dnd 5e will-o’-wisp can not wear or even carry anything.
Incorporeal Movement: Actually, this will-o’-wisp could move via some other creatures and also the objects like if they were difficult terrain. Normally, it takes 5 (1d10) force damage when if it ends its turn inside an object.
Variable Illumination: In this trait the will-o’-wisp would shed bright light within almost 5ft to 20 foot radius and the dim light for an additional number of feet which is equal to a selected radius. The will-o’-wisp capable of alter the radius as a Bonus Action.
Shock: As per this shock action this dnd monster can make a Melee Spell Attack: +4 to hit, reach 5 ft., one creature. Hit: 9 (2d8) lightning damage.
Invisibility: The will-o’-wisp monster and also its light can magically become Invisible until either it will attack or uses its consume life, or else until its Concentration will be end (as if it is concentrating on a spell).
Attributes Of Will-o’-Wisp DnD 5E Monster
|Condition Immunities||Exhaustion, Grappled, Paralyzed, Poisoned, Prone, Restrained, Unconscious|
|Languages||the languages it knew in life|
|Resistances||Acid, Cold, Fire, Necrotic, Thunder; Bludgeoning, Piercing, and Slashing From Nonmagical Attacks|
|Roll 0||1d20+4 2d8|
|Senses||Darkvision 120 ft.|
|Speed||0 ft., fly 50 ft. (hover)|