Surprisingly Inn can't be turned into anything.
Wander Minnstrel$5 - Action
+2 Actions
Reveal the top 2 cards of your deck. Put the Actions in your hand and discard the rest.
When you gain this, look through your discard pile (including this), reveal all Action cards from it, and put them on top of your deck in any order.
Minnion$5 - Action-Attack
+2 Actions
When you gain this or play it, each player (including you) discards his hand, looks through his discard pile, reveals 4 Action cards from it, and puts them in his hand.
Vinnyard$P - Victory
At the end of games using this, each player reveal cards from the top of his deck until revealing one that isn't an Action. Each Vinnyard is worth 1VP for every card revealed this way.
When you gain this, look through your discard pile (including this), reveal any number of Action cards from it and shuffle them into your deck.
Kinng's Court$5 - Action
+2 Cards
+2 Actions
Discard 2 cards. Look through your discard and reveal up to 3 Action cards from it. Shuffle them into your deck.
Urchinn$3 - Action-Attack
+1 Card
+1 Action
Each player (including you) discards down to 4 cards in hand.
When you gain this, you may trash this. If you do, gain a Mercenary from the Mercinnary pile.
Mercinnary$0* - Action-Attack
You may trash 2 cards from your hand. If you do, +2 Cards, +2 Actions and each other player discards down to 3 cards in hand.
When you gain this, look through your discard pile, reveal any number of Attack cards from it, and shuffle them into your deck.
Innheritance$7 - Event
Once per game: Move your Estate token to Innheritance. Your Estates gain the abilities and type of Inn.