Cascade Bluffs

{T}: Add {C}.
{U/R}, {T}: Add {U}{U}, {U}{R}, or {R}{R}.

Spirebluff Canal

Spirebluff Canal enters the battlefield tapped unless you control two or fewer other lands.
{T}: Add {U} or {R}.

Reveal cards from the top of your library until you reveal a nonland card, then put all cards revealed this way into your hand.

{T}: Add {C}.
{T}: Add {U} or {R}. Shivan Reef deals 1 damage to you.

Discard a land card: Seismic Assault deals 2 damage to any target.

You have no maximum hand size.
{T}: Add {C}.