This is an uncommon by the way, so itll fit nicely in some new designs around another fave green uncommon, Wilderness Reclamation
Theres no extra investment required Twinning Staff acts as an extra Lucky Clover whenever youre casting Adventure spells already getting copied by Gorion or Clover itself
The spider and Marvel symbols (SPE and MAR) will appear on cards that are legal in eternal formats and for any cards that might be new-name versions of cards (similar to the Godzilla treatments from Ikoria: Lair of Behemoths ) already legal in other formats like Pioneer or Modern
You can play him as a go-wide token swarm, a sacrifice aristocrat deck, or a full-on combo finisher
Then you can sac it for six mana but not tap it to Tutor and drop an Equipment to the battlefield, like half of a Tooth and Nail - great in the very popular Equipment brews too
My issue with Ugin is that I don't often find him winning games, I find him recovering a lot of games but it generally isn't the Ugin that then decides it