If youre running a creature heavy deck, maybe take it easy on the kill-all-creatures spells
Westvale Abbey Flip is not worth the cost to transform it, essentially 6 mana, 5 creatures, and sacrificing a land for a creature that doesn't change the game that much is very iffy
Playing sacrifice fodder is the way to go here, as youll be willing to sacrifice your Ichor Wellspring or Demonic Pact the card advantage is all yours, whether you draw or whether they sac permanents
Daxos the Returned has a similar effect
It has a bit of a learning curve, but it offers some of the best customization features
Time Walk Gamma Price: $26,400 Printed in Alpha and another member of the ultra-rare and ultra-powerful Power 9, Time Walk is a straightforward rulebreaker that lets you take an extra turn for two mana - easy to see why it's on just about every MTG banlist, and restricted to a single copy in Legacy