World tree [WT] is nemesis for corporations. Especially in Arissana Rocha Nahu: Street Artist the Toad. Because it has 3 keystones: tutoring, economic advantadge and interraction with a whole runner deck. For activation you need sussesfull run and sacrifice of an installed card. That's easy condition for shapers, cause they have a lot of cheap or situational cards to sacriface. Notable mentions - Muse, Coalescence, Self-modifying Code. And what you get from the tree once per turn? Flexibility, credits, click compression. WT has all answers for any matchup - credits, flatline defence, breakers, trashers. In comparison with Rosetta 2.0 it always get discount of 3 credits and interact not only with programs, but with recourses (reinstalling Daily Casts, Miss Bones, Earthrise Hotel etc.) and hardwares (LilyPAD, DZMZ Optimizer, Boomerang etc.). And our Toad has quite broken interaction with WT - fuel the engine via installing programs mid-run. Moreover, the Toad don't afraid to facecheck and has answers (Physarum Entangler, Ika, Mayfly) for nasty rigshotting ices, thus defending WT. So, World Tree prevails in current meta, but today should be banned. Would be a good piece of wooden furniture for corporate bosses, hehe.