In the few months since release, these cards have already begun to skyrocket in price due to their limited availability, so its likely well see the cards from Hatsune Miku: Digital Sensation follow suit
If the target creature dies that turn, Searing Blood will deal 3 damage to whoever controls the creature when it dies, who isn't necessarily the player who controlled it when Searing Blood resolved
Out of the Shadows With Gitaxian Probe getting banned in the last announcement, it essentially took Become Immense with it, sort of creating a soft-ban on the card because of how de-powered Become Immense became
Thats not too difficult to accomplish in Mono-Black, with both Sephiroth and Vengeful Bloodwitch offering accessible drain effects
Flying, lifelink Creature Enchantment - Saga Moogle Lifegain (CTRL to add secondary) Mass Interaction Mass Interaction (CTRL to add secondary) Protection Cloudsteel Kirin Flying Equipped creature has flying and "You can't lose the game and your opponents can't win the game." Reconfigure (: Attach to target creature you control
Secure storage is only step one for a competitive player