Chainsaw

'Chainsaw' enters the battlefield with three fuel counters. When ever equipped creature attacks/blocks, remove a fuel counter from 'Chainsaw'.
Equipped creature gets +3/+1 and has first strike, if there are fuel counters on 'Chainsaw'.
Pay {1} and sacrifice a card named 'Gas Can': Place three fuel counters on Chainsaw.
Equip {1} ({1}: Equip only as a sorcery.)