From Beyond

Two effects most enchantments would never combine sit on the same permanent here, and the seam between them is the whole point. The upkeep trigger drips out Eldrazi Scions, each a deferred mana source you cash in by sacrifice, building a colorless ramp engine one body at a time. The activated ability does the opposite work: it converts the enchantment itself into a tutor, fetching the expensive Eldrazi the Scions were busy paying for. So the card runs on a timer that argues against its own escape hatch. Leave it down and it grows your board into colorless mana and chump blockers; crack it and you trade the engine for the single big payoff it was always meant to enable. That tension is the design. The Scions do double duty as ramp and as fodder for sacrifice synergies, but the structure is built around a specific ramp-into-payoff curve where the enchantment is both the runway and the plane. It belongs to the wave of devoid permanents that gave colorless threats a green-aligned support shell: green supplies the mana acceleration and the tutor, while the spoils are unaligned by color. The tutor is slow and narrow, restricted to Eldrazi cards and gated behind a sacrifice, so it reads as a build-around rather than a generic value piece. The card only makes sense inside a deck that wants what it digs for.