Season of Growth and Sylvan Anthem works wonder in our Simic Elf Tribal since our deck is creature-heavy and we can potentially scry multiple times every turn
You use a deck of 100 cards led by a legendary creature, aka, your Commander
The Tomb of Annihilation is based on the classic D&D Tomb of Horrors
This isnt a purely ideological inclusion, of course, Chained to the Rocks is a legitimately fantastic removal spell, good enough to see play across multiple formats
Theyll always be shown wearing the Stellar Crown (which is also the name of the set they debuted in), for example, and they have a sort of rainbow coloured border that makes them immediately visually distinct from other Tera Pokmon ex cards (though this latter point is not the case on the Hyper Rare, gold variant of the Terapagos ex card, as you can see below)