There are a lot of other lands in this deck that do similar things to Cavern of Souls, so you could always cut it and replace it with either another dual land or a basic land
For three mana, you get a Red 3/2 that creates a 1/1 Warrior token thats attacking whenever a Warrior attacks
Alternatively, Trostani, Selesnya's Voice will gain a lot of life off of those big-butted wurms youll be dropping
Flockchaser Phantom Our next card is a 5/5 flying, vigilant creature for 4WU, but luckily it has convoke as well
For three mana, while this Human's toughness is statically four, its power is equal to the number of creatures under its owner's control
Gaia's Dark Hammer (Colossus Hammer Secret Lair) Colossus Hammer (Gaia's Dark Hammer) | Illustration by Marie Magny We don't see what Gaia is looking at, but it's clear that she intends to make her gaze's target have an intimate meeting with the business end of the huge Colossus Hammer she wields as if it weighed nothing