implemented
*Abyssal Gatekeeper
*Backfire
*Breeding Pit
*Flood
*Pestilence
*Sunken City
*Thrull token
Goblin Piledriver should get +2/+0 per other goblin, not +1/+0.
Wei Ambush Force should be 1/1, not 2/2
missing ability
merged and fixed cards contributed by neilpturley
merged fixes by manve.herumedre