Instead of being destroyed, the creature gets tapped, its removed from combat (if its in combat), and all its damage is healed
We made Sarcomite Myr knowing one day we'd return to a Phyrexian infected Mirrodin, but we ended up using colored artifacts on the Esper shard in Shards of Alara , which prevented us from making straight-up colored artifacts in Scars of Mirrodin block (we ended up using Phyrexian mana to make colored artifacts)
As demand increases, so does the value, and there will always be someone willing to pay the price to collect them all
Nothing will turn a newcomer away from card games faster than something as shitty as those titles
These are practically Temporal Fissure on a stick that doesnt require going all-in to function
Cast it for free, find Prismari, and suddenly the deck can start turning one huge spell into a much larger chain of nonsense