Mountain

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Look at the top three cards of your library, then put them back in any order. You may shuffle.
Draw a card.

Flying
Whenever you draw a card, Niv-Mizzet, the Firemind deals 1 damage to any target.
{T}: Draw a card.

Whenever you draw your second card each turn, create a 1/1 blue Faerie creature token with flying.
{4}{U}{R}: Draw a card, then discard a card.

Draw three cards, then put two cards from your hand on top of your library in any order.

Sulfur Falls enters tapped unless you control an Island or a Mountain.
{T}: Add {U} or {R}.

Haste
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

{2}{U}, {T}, Discard a card, Sacrifice a land: Search your library for up to two basic land cards, put them onto the battlefield, then shuffle.

Search your library for a card, put that card into your hand, discard a card at random, then shuffle.

Enchant creature
Whenever enchanted creature deals damage to an opponent, you may draw a card.