You may have to pay to enchant or equip, but with this card, you dont have to worry about using mana to draw cards
For example, while a conjured card is in a public zone, you can represent it by writing on a piece of paper or using some kind of token
Fitting four-mana removal into your curve is normally awkward, but paying for Pile On partially (or entirely) by tapping creatures and tokens makes it incredibly flexible in the right builds
Against Affinity, Kataki, War's Wage can be just as good as Stony Silence, making it really hard for the opponent to execute their game plan
Which is pretty impressive, especially when you consider what a useless, comedic character the Prince is within the story of The Princess and the Frog