mtg transformers commander decks Optimus Prime, Hero (Commander) deck contains The Lord of the Rings:

Name - Odin (XVI)

Value, board presence, all while filling the yard for a game winning Season of Loss

The final bit of text reads: If a legendary permanent or an artifact entering or leaving the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time. Basically, Gandalf the White can do a lot of good stuff, and being a 4/5 isnt bad either

If a creature you control being dealt damage causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time

Dragonkin Berserker I think this card is eminently playable, he makes dragons, which costs 5, but since he reduces the coast of boast abilities by 1 for every dragon you control this could easily get nuts, especially in a set with a bunch of changelings