Seviper (50/147) [Sun & Moon: Burning Shadows] Elf Assassin it becomes a +1/+1 counter

it becomes a +1/+1 counter

Set: Eldritch Moon Type: Instant Rarity: Uncommon Cost: {4}{U}{U} Delirium — This spell costs {2} less to cast if there are four or more card types among cards in your graveyard

then sacrifice Phantasmal Sphere unless you pay {1} for each +1/+1 counter on it

Set: Classic Sixth Edition Type: Enchantment Rarity: Uncommon Cost: {2}{U}{U} {2}{U}{U}: Look at the top five cards of your library

their swords dipped too often in tainted flesh and poisoned blood

Seviper (50/147) [Sun & Moon: Burning Shadows] Elf Assassin it becomes a +1/+1 counterSet: Sun & Moon: Burning Shadows Type: Psychic Rarity: Uncommon Retreat cost: Colorless,Colorless