Biomancer's Familiar [Ravnica Allegiance Prerelease Promos] Shadowmoor Set: Friday Night Magic 2010

Set: Friday Night Magic 2010 Type: Enchantment Rare Cost: {2}{W} Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you

Set: Shadowmoor Type: Sorcery Rare Cost: {6}{B} Starting with you

Set: Judge Gift Cards 2011 Type: Creature — Human Wizard Rare Cost: {1}{B} At the beginning of your upkeep

Set: Limited Edition Beta Type: Instant Rare Cost: {W} Target blocking creature gets +7/+7 until end of turn

but it is necessary

Biomancer's Familiar [Ravnica Allegiance Prerelease Promos] Shadowmoor Set: Friday Night Magic 2010Set: Ravnica Allegiance Prerelease Promos Type: Creature Mutant Rarity: Rare Cost: {G}{U} Activated abilities of creatures you control cost {2} less to activate. This effect can't reduce the mana in that cost to less than one mana. {T}: The next time target creature adapts this turn, it adapts as though it had no +1 +1 counters on it.