Elbrus, the Binding Blade
// Withengar Unbound
From the Vault: Transform (V17 #8)
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CHCardhoarder
Normal
0.03 tix
CKCard Kingdom
Foil
$5.49
CMCardmarket
Foil
€3.09
MPMana Pool
Foil
$5.87
TCTCGplayer
Foil
$6.51
Elbrus, the Binding Blade
Type
Legendary Artifact — Equipment // Legendary Creature — Demon
Rules Text
Equipped creature gets +1/+0.
When equipped creature deals combat damage to a player, unattach Elbrus, then transform it.
Equip 
// Transform
Withengar Unbound
Type
Legendary Creature — Demon
Rules Text
Flying, intimidate, trample (A creature with intimidate can't be blocked except by artifact creatures and/or creatures that share a color with it.)
Whenever a player loses the game, put thirteen +1/+1 counters on Withengar Unbound.
P/T
13/13
Printing
From the Vault: Transform (V17 #8)
mythic
Illustrated by Eric Deschamps
sunmoondfc