Emerald Collector (YOTJ-006) [Alchemy: Outlaws of Thunder Junction]

Whenever Emerald Collector deals combat damage to a player, draw a card.
When you draw your third card in a turn, conjure a card named Mox Emerald into your hand. This ability triggers only once.
{2}: Emerald Collector has base power and toughness 4/4 until end of turn.