What are the abilities of Bill Ferny, Bree Swindler?
user
Whenever Bill Ferny, Bree Swindler becomes blocked, choose one —\n• Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")\n• Target opponent gains control of target Horse you control. If they do, remove Bill Ferny from combat and create three Treasure tokens.
assistant