Theros Beyond Death

The Theros Gods
A feature/highlight of the set, the Theros Gods are extremely powerful in Cubelet and either need to be designed around to balance them or ignore them.

Omens
A cycle unique to Theros Beyond Death, as a whole, the Omens, besides Omen of The Hunt are decent enough to consider for a pauper cubelet. Omen of the Hunt does not work with the format.

Alseid of Life's Bounty
The one-time protection can get be very timely and being able to add enchantment to any delirium strategies is nice as well.

Elspeth Conquers Death
Potentially too strong, but there is a lot of utility and for the price, it might balance it out.

Elspeth, Sun's Nemesis
Not a particularly strong planeswalker, but the escape mechanic can help clean up the graveyard of any annoying cards.

Taranika, Akroan Veteran
Rewards playing creatures early to apply pressure on the opponent's life total.

Nadir Kraken
There's not a tremendous amount of draw spells, but if ignored, can create issues for opponents.

Thassa's Intervention
A wicked late game spell, but the flexibility of being a counterspell or a card selection spell is something to consider.

Cling to Dust
Helps control the graveyard while rewarding you with life or cards. An interesting substitute if you aren't running a card like Scrapheap Scrounger.

Pharika's Libation
If designing an enchantment heavy cubelet, it having two modes is flexible enough to consider.

Anax, Hardened in the Forge
Devotion might be an issue, but the ability to have some resiliency to boardwipes is something to consider.

Phoenix of Ash
Cheap way to get a few points of damage in the air while being a graveyard control tool with the Escape mechanic.

The First Iroan Games
A fair saga. An enchantment to consider if playing with delirium in the cubelet.

Atris, Oracle of Half-Truths
A fun mini-game with minor value add. You'll likely always take the pile with two cards.

Polukranos, Unchained
Probably one of the biggest bodies in most cubelets, but the fact that it shrinks with blocks/fighting makes it a contender for a cubelet

Shadowspear
A strong cheap artifact if your cubelet likes to play with cheap equipment.