flood counter cards mtg Standard Staple Spikes 594% Due to Sneaky Synergy If its a land Quicksilver Fountain · Mirrodin (MRD)

And then there's Currency Converter and Bag of Holding

If this causes the greatest power among creatures you control to change (for example, if you control a creature with "This creature's power is equal to the number of cards in your hand"), that new power will be used to determine the cost reduction

To be fair, a clearer wording could have helped avoid this misunderstanding

We already know how good that is

Which new ally commanders catch your interest

As you cast a spell or activate an ability with one or more Phyrexian mana symbols in its cost, you choose how to pay for each Phyrexian mana symbol at the same time you would choose modes or choose a value for X