Like any competitive format, cEDH revolves around cheap and efficient spells, and there are precious few creatures that dont have a one or a two in their textbox
Your next step is practical: audit your collection using the ROI framework covered in this guide, then perform a careful self-assessment of your strongest candidates under direct light before committing to submission
Runes of the Deus: a keeper, except that its a five drop
It's powerful in any creature heavy deck from Golgari Elf decks to Selesnya or Gruul Aggro to Simic's +1/+1 Counters Matter on a big number of dorks to put them on
Summon: Esper Ramuh and Slash of Light can certainly perform well, but theres also plenty of times (especially early game) where they simply wont work when you need them to
However, there are some incredibly valuable cards still to come in Black & White's most expensive booster boxes