Whenever you cast a spell from your hand, reveal the top X cards of your library, where X is that spell's converted mana cost. You may cast a card revealed this way with converted mana cost X or less without paying its mana cost. Put the rest on the bottom of your library in a random order.
![Sunbird's Invocation [Ixalan] | Spectrum Games](http://spectrumgaming.com.au/cdn/shop/products/1ee52480-8faf-4418-af70-fd999096e3bb.jpg?v=1591936537)
