Oath of Liliana [Eldritch Moon Promos] Amonkhet Prerelease Promos if you control the artifact

if you control the artifact with the highest converted mana cost or tied for the highest converted mana cost

but I didn't expect it from the building itself

Set: Lorwyn Type: Creature — Elemental Incarnation Rare Cost: {3}{B}{B}{B} Fear (This creature can't be blocked except by artifact creatures and/or black creatures

" "whenever

Oath of Liliana [Eldritch Moon Promos] Amonkhet Prerelease Promos if you control the artifactSet: Eldritch Moon Promos Type: Legendary Enchantment Rare Cost: {2}{B} When Oath of Liliana enters the battlefield, each opponent sacrifices a creature. At the beginning of each end step, if a planeswalker entered the battlefield under your control this turn, create a 2 2 black Zombie creature token. "I'll keep watch. Happy now?"