Karn, Argentic Oracle

+1: Choose a nonland permanent type. Target player exiles a nontoken permanent they control of the chosen type with a silver counter on it.
-2: Draw three cards, put a card from your hand on top of your library, then exile a card from your hand with a silver counter on it.
-8: You may cast any number of exiled cards with silver counters on them without paying their mana cost.