The card types that can normally appear on spells are artifact, creature, enchantment, instant, land, planeswalker, sorcery, and tribal. Legendary, basic, and snow are supertypes, not card types.

Some playtest cards have unusual type lines. To determine whether those cards have a card type not listed above, refer to that card’s rulings on Gatherer.wizards.com.

If you don’t draw a card, you don’t discard a card.