Cloud Key - [Schematic] The Brothers' War Retro Artifacts (BRR) Creature Put a number of +1/+1

Put a number of +1/+1 counters on it equal to the amount of life you gained this turn or the amount of life you lost this turn

"At this rate I fully expect to be replaced by a clockwork golem by year's end

You lose half your life

The path offered by the academy is long and difficult

and you decide whether to flip again

Cloud Key - [Schematic] The Brothers' War Retro Artifacts (BRR) Creature Put a number of +1/+1As Cloud Key enters the battlefield, choose artifact, creature, enchantment, instant, or sorcery. Spells you cast of the chosen type cost {1} less to cast. "A key only unlocks a door. Its wielder must choose whether to cross the threshold." *Hurkyl's Metaphysics, vol. II*