Blood Tyrant (CON) from Conflux, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Karl Kopinski
• Card Text:
  Flying, trample
  At the beginning of your upkeep, each player loses 1 life. Put a +1/+1 counter on Blood Tyrant for each 1 life lost this way.
  Whenever a player loses the game, put five +1/+1 counters on Blood Tyrant.