Sokenzan - Oversized Planechase Card (OHOP) from Planechase Planes, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Brian Snõddy
• Card Text:
  All creatures get +1/+1 and have haste.
  Whenever you roll Chao, untap all creatures that attacked this turn. After this main phase, there is an additional combat phase followed by an additional main phase.