Sedge Sliver

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 this turn, instead tap it, remove it from combat, and heal all damage on it.)

Card Details:
Set: Time Spiral Remastered
Collector Number: 187
Artist: Richard Kane Ferguson