I look at the buffs from Patch 25.2.2 before playing Undead Shadow Priest on the ladder. You can find the deck import link below the following contact links. 

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# 2x (0) Undying Allies
# 2x (1) Animate Dead
# 1x (1) Shadow Word: Devour
# 2x (1) Shadowcloth Needle
# 2x (2) Thrive in the Shadows
# 2x (3) Amulet of Undying
# 2x (3) Brittleskin Zombie
# 2x (3) Cathedral of Atonement
# 2x (3) Haunting Nightmare
# 2x (3) Shadowed Spirit
# 2x (4) Bonecaller
# 2x (4) Grave Digging
# 1x (4) High Cultist Basaleph
# 2x (4) Void Shard
# 1x (5) Darkbishop Benedictus
# 2x (5) Shadow Word: Undeath
# 1x (8) Xyrella, the Devout
#
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