It fills your hand, fuels Szarel , and sets up explosive turns with little downside
I also think these suggestions probably give away the direction I would try to take the deck with my changes: a more efficient, interactive deck that focuses on ramping toward Sauron mana reliably alongside a mix of interaction and reanimated monsters to impact the game in the meantime
Psionic Ritual Another unique support card for Horrors (and tribal tribal decks with Maskwood Nexus), this is costed after Minds Desire for a reason
Just like its white counterpart, Steppe Lynx, its landfall ability works best in combination with fetchlands, which will drive up the price of any deck featuring this card
With effects that range from slow, steady sources of damage that drain your opponent 1 life at a time to massive spells that consume half their life at once, theres a life loss card for any strategy