mtg assist cards Lorwyn Eclipsed Common Unexpected Assistance #80 then discard a card. Winged Words — Rulings, Legalities

There's no limit on this, and where this is a problem is that anyone draws the cards, not just you, so this is strongest in decks that have self-sacrifice engines like Vampiric Rites

Search your library for X cards, then shuffle and put those cards on top in any order

If this is compared to Consecrated Sphinx which generally gets at least two cards and is likely averaging about 5 per cast you can see why I don't think this is over powered

While there are some exceptions, generally, if you bring an un-upgraded precon to a Commander table, youre in bracket two

Theres also an interesting build where you use Nissa as a tutor for a combo deck

Grave Matters can be a risky deck, but the payoff is incredible