As Frostboil Snarl enters the battlefield, you may reveal an Island or Mountain card from your hand. If you don't, Frostboil Snarl enters the battlefield tapped. {T}: Add {U} or {R}.
"We're on the Thames. The last great Frost Fair. 1814, February the 4th."
—The Twelfth Doctor
![Frostboil Snarl (Extended Art) [Doctor Who]](http://tothetablebgc.myshopify.com/cdn/shop/files/d2c2829b-6f48-418b-a4ca-000d3241c5ca.png?v=1776659513&width=1445)
