Umezawa's Jitte [From the Vault: Lore] Shadows over Innistrad Prerelease Promos Counter target spell if its

Counter target spell if its mana value is X

Seeking the company of plants ensures that your wits will go to seed

if it has a +1/+1 counter on it

it puts twice that many of those counters on that permanent instead

They found something far greater

Umezawa's Jitte [From the Vault: Lore] Shadows over Innistrad Prerelease Promos Counter target spell if itsSet: From the Vault: Lore Type: Legendary Artifact Equipment Rarity: Mythic Cost: {2} Whenever equipped creature deals combat damage, put two charge counters on Umezawa's Jitte. Remove a charge counter from Umezawa's Jitte: Choose one Equipped creature gets +2 +2 until end of turn. Target creature gets 1 1 until end of turn. You gain 2 life. Equip {2}