Three lands, some mana rocks that tap for colorless and an equipment arent going to do you any good without a body to attach the equipment to or a blocker to ensure Dihada survives for more than one turn cycle
This is because the Delver is part of a mega cycle. In other words, cards spread across multiple sets are used to tell the story here
Because there are other Human-themed commanders running around, Id avoid heading that direction as well
The fact that you get to flicker her over and over again means that she combos with cards like Eerie Interlude
If you look at the Dredge decks that we've talked about so far, they all have one thing in common: they only have one plan, which is to beat down with creatures
Just make sure to check the card rarity before any trade or sale, to better understand what you got in your collection and what is its value