Nettling Imp [International Collectors’ Edition] Rat Ninja Creatures can't attack you unless

Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you

Set: New Phyrexia Type: Artifact Creature — Insect Rarity: Rare Cost: {1} {X}{B/P}: Remove up to X counters from target permanent

Set: Zendikar Expeditions Type: Land — Island Swamp Rarity: Mythic ({T}: Add {U} or {B}

Sacrifice Pernicious Deed: Destroy each artifact

Set: Commander 2011 Launch Party Type: Legendary Creature — Elf Rogue Rarity: Rare Cost: {1}{G}{U} Whenever a creature deals combat damage to one of your opponents

Nettling Imp [International Collectors’ Edition] Rat Ninja Creatures can't attack you unlessSet: International Collectors Edition Type: Creature Imp Rarity: Uncommon Cost: {2}{B} {T}: Choose target non Wall creature the active player has controlled continuously since the beginning of the turn. That creature attacks this turn if able. Destroy it at the beginning of the next end step if it didn't attack this turn. Activate this ability only during an opponent's turn, before attackers are declared.