Urza's Mine

{T}: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.

Urza's Tower

{T}: Add {C}. If you control an Urza's Mine and an Urza's Power-Plant, add {C}{C}{C} instead.

{T}: Add {C}. If you control an Urza's Mine and an Urza's Tower, add {C}{C} instead.

When Radiant Fountain enters, you gain 2 life.
{T}: Add {C}.

When Perilous Myr dies, it deals 2 damage to any target.

When Sunscorched Desert enters, it deals 1 damage to target player or planeswalker.
{T}: Add {C}.

{2}, {T}, Sacrifice Expedition Map: Search your library for a land card, reveal it, put it into your hand, then shuffle.

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)

When Peace Strider enters, you gain 3 life.

Annihilator 2 (Whenever this creature attacks, defending player sacrifices two permanents.)
Ulamog's Crusher attacks each combat if able.

{5}, {T}, Sacrifice Lightning-Core Excavator: It deals 3 damage to any target.

When Candy Trail enters, scry 2.
{2}, {T}, Sacrifice Candy Trail: You gain 3 life and draw a card.

{T}: Add {C}.
{1}, {T}, Sacrifice Mind Stone: Draw a card.

When Filigree Familiar enters, you gain 2 life.
When Filigree Familiar dies, draw a card.