One Does Not [Unknown Event] Mercadian Masques put a +1/+1 counter on

put a +1/+1 counter on Sengir Vampire

choose a counter on a permanent you control

Set: Alpha Edition Type: Artifact Rarity: Rare Cost: {3} {1}: The next time an unblocked creature of your choice would deal combat damage to you this turn

Set: Phyrexia: All Will Be One Type: Artifact — Equipment Rarity: Mythic Cost: {3} Equipped creature gets +2/+2 and has protection from red and from green

One Does Not [Unknown Event] Mercadian Masques put a +1/+1 counter onSet: Unknown Event Type: Enchantment Aura Rarity: Common Cost: {1}{U} Enchant creature Enchanted creature does not simply untap during its controller's untap step. Enchanted creature has nonbasic landwalk. (It can't simply be blocked as long as defending player controls a nonbasic land.)