In the unusual case where Due Diligence's second ability triggers and then Due Diligence becomes attached to the target of its own triggered ability before that ability resolves, when the triggered ability tries to resolve, it won't resolve and none of its effects will happen
Other The World Tree is a powerful Land that as long as we control 6 or more Lands, it gives all our Lands the ability to to add one mana of any color, which works wonders in our Dragon Tribal which is very color intense
Whilst not being as memorable or awesome as transformations, Escalate is a fine mechanic that leads to some solid gameplay choices should you play the spell early to try and gain the upper hand, or wait to cast it at its max potential later
If you don't mind a deck that feels more directionless and asks you to adapt on the fly, you'll get on with this deck just fine
This screams Commander to me at first glance, but could have an overlooked use in a competitive format
Given how good the archetype is in the format, Sephiroth was an easy top pick for that reason