Biomancer's Familiar [Ravnica Allegiance Prerelease Promos] Shadowmoor Set: Antiquities Type: Creature —

Set: Antiquities Type: Creature — Treefolk Rare Cost: {1}{G}{G} Gaea's Avenger's power and toughness are each equal to 1 plus the number of artifacts your opponents control

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

You may cast it without paying its mana cost if it's a spell with lesser converted mana cost

but it is necessary

"I give my blood

Biomancer's Familiar [Ravnica Allegiance Prerelease Promos] Shadowmoor Set: Antiquities Type: Creature —Set: 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.