Obsessive Pursuit - Avatar: The Last Airbender Promos #112s

Obsessive Pursuit

Set: Avatar: The Last Airbender Promos (PTLA)
Collector Number: 112s
Type: Enchantment
Rarity: Rare
Mana Value: 2.0

When this enchantment enters and at the beginning of your upkeep, you lose 1 life and create a Clue token. (It's an artifact with "{2}, Sacrifice this token: Draw a card.")
Whenever you attack, put X +1/+1 counters on target attacking creature, where X is the number of permanents you've sacrificed this turn. If X is three or more, that creature gains lifelink until end of turn.