You can discard 1 "Priestess" card from your hand to target 1 monster on the field
Most decks will want to have at least 10 sources of each of these, so if you're struggling to reach that elusive 100 card total, just remember the three R's: Removal, Ramp and, er, CaRd Draw
Top 3: 8-Cast Lands Creatures Spells Sideboard Up to now, all of the decks that have been listed are archetypes that have existed for many years, but its standing in the format has fluctuated based on the printing of new cards and the metagame at the time
Its not quite as powerful as The One Ring, but in the right deck, it can do just as much work
Want to shut down ramp in green, reanimation enablers like Entomb, or even slow down cEDH combo decks using Thassa's Oracle lines