Safi'jiva, Crimson Emperor

Trample, Menace, Flying

Whenever you tap a land for mana, you may exert it. When you do, choose one:
•Add one mana of any type that land produced.
•Draw a card.

Sapphire of the Emperor — When Safi'jiva dies, each player may choose a creature they control. Creatures chosen this way phase out. Then, destroy all creatures.