Rhystic Study [Commander's Arsenal] Unlimited Edition Set: Morningtide Type: Enchantment Rarity:

Set: Morningtide Type: Enchantment Rarity: Rare Cost: {1}{G} Whenever a creature enters the battlefield under your control

If damage is prevented this way

Set: Fifth Edition Type: Artifact Rarity: Rare Cost: {1} Mana Vault doesn't untap during your untap step

Set: Portal Three Kingdoms Type: Instant Rarity: Uncommon Cost: {W} Cast this spell only during the declare attackers step and only if you've been attacked this step

among any of the creatures it's being blocked by or is blocking

Rhystic Study [Commander's Arsenal] Unlimited Edition Set: Morningtide Type: Enchantment Rarity:Set: Commander's Arsenal Type: Enchantment Rarity: Common Cost: {2}{U} Whenever an opponent casts a spell, you may draw a card unless that player pays {1}. Friends teach what you want to know. Enemies teach what you *need* to know.