Prosperous Innkeeper

Aubergiste prospère (Prosperous Innkeeper) (fr)

Creature - Halfling Citizen | Power/Toughness: 1 / 1 (CMC 2)
When Prosperous Innkeeper enters the battlefield, create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")
Whenever another creature enters the battlefield under your control, you gain 1 life.