I already created a "Spiky blue shell", but Mario Kart deserves well a tribute for its 20th anniversary :
http://www.jeuxvideo.com/news/2012/00060953-mario-kart-a-20-ans.htm(My favourite is Double Dash)Here are the item piles. They form all one Kingdom pile.
-Green shell-
Action item attack victory
Worth 1 VP
Each other player reveals the top 5 cards of his deck. If he reveals any item, he trashes one you choose. Otherwise, he trashes a revealed card you choose. They discard the other revealed cards.
-Red shell-
Action attack item
Each other player reveals cards from top of his deck until he reveals a victory card. He trashes it and may gain a card costing less than it. He discards the other revealed card.
Each other player reveals the top 5 cards of his deck. If he reveals any item, he trashes one you choose. Otherwise, he trashes a revealed card you choose. They discard the other revealed cards.
-Banana-
Action attack item
Every player (including you) reveals the top card of his deck and either discards it or puts it back, your choice.
Each other player reveals the top 5 cards of his deck. If he reveals any item, he trashes one you choose. Otherwise, he trashes a revealed card you choose. They discard the other revealed cards.
-Star-
Action attack duration item.
+2 actions. At the start of your next turn, +1 action.
Each other player reveals the top 5 cards of his deck. If he reveals any item, he trashes one you choose. Otherwise, he trashes a revealed card you choose. They discard the other revealed cards.
---
While this is in play, you are unaffected by opponent's attack.
-Mushroom-
Action attack duration item.
+2 actions
Each other player reveals the top 5 cards of his deck. If he reveals any item, he trashes one you choose. Otherwise, he trashes a revealed card you choose. They discard the other revealed cards.
-Ghost-
Action attack duration item.
Each other player reveals an action card from his hand (or reveals a hand without action cards). You may choose one player to trash his card and you gain it, so this player gains this Ghost.
Each other player reveals the top 5 cards of his deck. If he reveals any item, he trashes one you choose. Otherwise, he trashes a revealed card you choose. They discard the other revealed cards.
-Fake item-
Each other player trashes the top cards of top of his deck and gains a card with the same cost that you choose.
Each other player reveals the top 5 cards of his deck. If he reveals any item, he trashes one you choose. Otherwise, he trashes a revealed card you choose. They discard the other revealed cards.
-Golden Mushroom-
Action Treasure attack item
If played as an action :
+10 actions
Each other player reveals the top 5 cards of his deck. If he reveals any item, he trashes one you choose. Otherwise, he trashes a revealed card you choose. They discard the other revealed cards.
If played as a treasure : worth $2
-Lightning Strike-
Action attack duration item
Now and at the start of your next turn : each other player discards down to 3 cards in hand.
Each other player reveals the top 5 cards of his deck. If he reveals any item, he trashes one you choose. Otherwise, he trashes a revealed card you choose. They discard the other revealed cards.
-Triple green shell-
Action attack duration victory
Worth 3 VPs.
Each other player reveals the top 5 cards of his deck. If he reveals any item, he trashes one you choose. Otherwise, he trashes a revealed card you choose. They discard the other revealed cards.