Most ability lands in Magic are all about the ability, often the land they are on is the nut low at producing mana if it does at all
Just play this on curve or earlier, with Dark Ritual without mentioning its in your deck
Pete's not doing anything that groundbreaking though, and is not about to become an EDH staple
Pair this with a card that taps to draw, like Arcanis the Omnipotent, and draw through your whole deck
Self-mill Golgari is already a small deck subtype that hasn't found a lot of foothills in the recent meta, but there are certainly ways that this card could help change that
The D23 promo version of Maleficent, Monstrous Dragon, and every other promo from the event are likely to maintain their value over time, making them solid investments if you happen to have a few in your collection.