Card

Mirrorpool

Edge of Eternities Art Series

Edge of Eternities: Stellar Sights

Land

This land enters tapped.
{T}: Add {W} or {U}.
{3}{W}{U}: Until end of turn, this land becomes a 4/4 white and blue Elemental creature with flying and vigilance. It's still a land.

Celestial Colonnade

{T}: Choose a color of a permanent you control. Add one mana of that color.

Meteor Crater

Copy

This land enters tapped.
{T}: Add {C}.
{2}{C}, {T}, Sacrifice this land: Copy target instant or sorcery spell you control. You may choose new targets for the copy.
{4}{C}, {T}, Sacrifice this land: Create a token that's a copy of target creature you control.