No. Items are cards that have a Gold Piece value or the text "No value" in the bottom-right of the card.
Illusion can only be played from the hand.
Only the card types that the rules specify stay on the table and the cards that state themselves that they stay on the table (perhaps by saying when you discard them) will stay on the table. For base
Munchkin, this means that only the following ones may stick around:
- Race cards
- Class cards
- Half-Breed and Super Munchkin
- Cheat!
- Curse cards with a persistent or future effect
- Items
- Specials (non-Item Treasure cards) that provide a permanent combat bonus (e.g., Really Impressive Title and Hireling)