I covered a wide selection of strong replacements for this in my Replacements for Commander Staples article, to make sure you can get your hands on a good mass removal spell
If the target land is an illegal target when Sandworm's last ability tries to resolve, it won't resolve and none of its effects will happen
Argothian Enchantress (T1, Ext, Block) So let me get this straight: once I have this untargetable creature in play, I can draw a card each time I play any enchantment
Not only does she also have resist, she has more Lore value, higher defense, and a stronger ability
If you want to see how these cards can power up your builds, take a look at our picks for the best MTG Commander decks
This deck is an overall good learning tool