Sedge Sliver (TSR) from Time Spiral Remastered, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Richard Kane Ferguson
• Card Text:
  All Sliver creatures have “This creature gets +1/+1 as long as you control a Swamp.”
  All Slivers have “B: Regenerate this permanent.” (The next time it would be destroyed, instead tap it, remove it from combat, and heal all damage on it.)