Cascading Cataracts

Indestructible
{T}: Add {C}.
{5}, {T}: Add five mana in any combination of colors.

Thought Monitor

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
Flying
When Thought Monitor enters, draw two cards.

Destroy target land you control and target land you don't control.

Lightning Bolt deals 3 damage to any target.

Destroy target land. Its controller may search their library for a basic land card, put it onto the battlefield tapped, then shuffle.
Draw a card.

Silverbluff Bridge enters tapped.
Indestructible
{T}: Add {U} or {R}.

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

Flying, haste
Shivan Devastator enters with X +1/+1 counters on it.

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

Destroy target land. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle.
Draw a card.