Frantic Search

Draw two cards, then discard two cards. Untap up to three lands.

Sulfur Falls

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

{T}: Add {C}.
{T}: Add {U} or {R}. This artifact deals 1 damage to you.

If you would draw a card, exile the top two cards of your library instead. You may play those cards this turn.

Draw two cards, then discard two cards.
Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

{T}: Add one mana of any color in your commander's color identity.

{T}: Add {C}.
{T}: Add {U} or {R}. This land deals 1 damage to you.

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