Because there is no hard stipulation for whether or not a player needs to actually pay a chosen X amount, players have interpreted this as an opportunity to simply declare what the X amount would be - and then choose not to pay it
It performs well against Delver, serves as a strong threat against control, and provides Maverick with some turn-0 interaction against fast combo decks
They're ideal in your opener, and after that you can try to discard your tapped land for value
It enters play with six strength and willpower and can quest for two lore
"Hysteric Sign" will add 3 "Harpie" cards with different names from the owner's Deck to their hand when it is sent to the Graveyard, and if its other effect wasn't activated that turn, only one "Harpie Lady" card with the name condition can be added, since it can't uses its original name
Her +1 ability to make a 0/1 plant may seem anemic by itself, but it serves to help protect her from opposing creatures in combat