mtg for mirrodin cards Mirrodin: Full Card Gallery then discard a card Magic the Gathering - MTG:

When souls started escaping from the underworld and challenging their fates, an enraged Klothys returned in a big way in Theros: Beyond Death

This can provide a significant cost reduction to many key Dragons, making it quite powerful when paired with a wide variety of Dragon-Tribal synergies

Put multiple copies in your next green deck and watch the lore roll in

If you don't control an Army, create a 0/0 black Orc Army creature token first.) Creature - Rogue Orc Shelob, Dread Weaver Whenever a nontoken creature an opponent controls dies, exile it

Given all the other cards Ive mentioned on this list, I think its pretty clear why Ancestral Recall deserves the top spot