Ghostblade Eidolon

Medium Undead, Any Alignment

STR
16 (+3)
DEX
15 (+2)
CON
12 (+1)
INT
13 (+1)
WIS
12 (+1)
CHA
14 (+2)
Blurred Form.

Attack rolls against the eidolon are made with disadvantage unless the eidolon is incapacitated.

Incorporeal Movement.

The eidolon can move through other creatures and objects as if they were difficult terrain. It takes 5 (1d10) force damage if it ends its turn inside an object.

Turn Resistance.

The eidolon has advantage on saving throws against any effect that turns undead.

Actions

Multiattack.

The eidolon makes two ghostblade attacks.

Ghostblade.

Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 3) slashing damage plus 11 (2d10) force damage.

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Ghostblade Eidolon

Source: Theros: No Silent Secret, p. 222 - Licenses and attribution