Oskar, Deranged Genius

Each Artifact card in your hand has madness. Its madness cost is equal to its mana cost reduced by {3}. (If you discard that card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Delirium —At the beginning of your upkeep, you may discard a card. Then, if there are four or more card types among cards in your graveyard, you may draw a card.