Hivestone [Time Spiral Remastered]Set: Time Spiral Remastered Type: Artifact Rarity: Rare Cost: {2} Creatures you control are Slivers in addition to their other creature types. Rath's evincars used hivestones to control the slivers, but the overlay put their power into unwitting hands. Now the stones make not masters, but slaves.

Set: Exodus Type: Creature — Specter Spirit Rarity: Rare Cost: {3}{B}{B} Flying

Set: Planeshift Type: Creature — Wurm Rarity: Rare Cost: {3}{R}{G} Trample

a being called Memnarch

{W}{U}{B}{R}{G}: Scry 3

Urza's Science Fair Project gets the indicated result

I have never felt so inspired

Set: Sun & Moon: Unified Minds Type: Fighting Rarity: Rare Retreat cost: 0

Swimming in coins proved harder than they'd hoped

Set: Theros Beyond Death Type: Enchantment Creature — Spirit Rarity: Rare Cost: {1}{W} First strike

you may pay {2}{R}{R}{R}

target opponent creates two 3/3 green Centaur creature tokens with protection from black

These beings embody the essence of true heroes long dead