Guile can't be blocked except by three or more creatures.
If a spell or ability you control would counter a spell, instead exile that spell and you may play that card without paying its mana cost.
When Guile is put into a graveyard from anywhere, shuffle it into its owner's library.
![Guile [Modern Masters 2015] | The Clever Kobold](http://thecleverkobold.com/cdn/shop/products/b9021f91-0b92-44ff-9ccb-bcf1e81232c2.jpg?v=1574227592)
