Skithiryx, the Blight Dragon [The List] Sliver Mutant Wall of Shadows can't be

Wall of Shadows can't be the target of spells that can target only Walls or of abilities that can target only Walls

it's gone forever

Set: Jumpstart Type: Instant Rarity: Common Cost: {R} Outnumber deals damage to target creature equal to the number of creatures you control

Set: Exodus Type: Creature — Lizard Rarity: Common Cost: {4}{G} {2}{G}: Plated Rootwalla gets +3/+3 until end of turn

Set: Conspiracy Type: Conspiracy Rarity: Uncommon Hidden agenda (Start the game with this conspiracy face down in the command zone and secretly choose a card name

Skithiryx, the Blight Dragon [The List] Sliver Mutant Wall of Shadows can't beSet: The List Type: Legendary Creature Phyrexian Dragon Skeleton Rarity: Mythic Cost: {3}{B}{B} Flying Infect (This creature deals damage to creatures in the form of 1 1 counters and to players in the form of poison counters.) {B}: Skithiryx, the Blight Dragon gains haste until end of turn. {B}{B}: Regenerate Skithiryx.