Umezawa's Jitte [Betrayers of Kamigawa] Revised Edition A deck can have any

A deck can have any number of cards named Relentless Rats

A keepsake for Vraska

Set: San Diego Comic-Con 2017 Type: Legendary Planeswalker — Jace Rarity: Mythic Cost: {3}{U}{U} +1: Scry 1

Set: Shards of Alara Type: Instant Rarity: Rare Cost: {3}{B}{B} Reveal the top card of your library and put that card into your hand

If damage is prevented this way

Umezawa's Jitte [Betrayers of Kamigawa] Revised Edition A deck can have anySet: Betrayers of Kamigawa Type: Legendary Artifact Equipment Rarity: Rare 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}