For collectors, it means a 207-card base set with a strong secret rarity class, several first appearances, and premium targets like the two Iconic cards, Lilo & Stitch Fun-Loving Friends and Belle & Beast Certain as the Sun
Ravine, easily searchable via Romulus lets you keep getting the Dragons that love your GY back where they belong
Let's stop for a moment and consider how many different things "this can't be sacrificed" needs to do: If an effect would cause the object to be sacrificed, it is not sacrificed
Even if it forces a boardwipe, youll gain 10,000 life from all the death triggers
The creatures seem reasonably strong, their Exploit abilities generate advantages, and theres definitely support for sacrifice themes
The life point regeneration is fine sure whatever but your goal is to kill your opponent in as few turns or moves as possible, not almost kill them then pass back with nothing on your board