Phasing appeared at Mirage set and since then its mechanics has been changed many times
C Common Fabled Raven X LIGHT Level 2 [ FiendTunerEffect ] ATK 1300 DEF 1000 Once per turn: You can discard any number of cards, and if you do, this card gains 1 Level and 400 ATK for each discarded card, until the end of this turn
Airflow Keep your cards in a well-ventilated area, or allow airflow into the room at least once a fortnight
The Commander The triggered ability on Saruman of Many Colors was the main draw for me
Like Breena, Mathas, Fiend Slayer rewards opponents with card draw for fighting each other
Finally, Emperors last line triggers whenever he has +1/+1 counters put on him (either through his own ability or through Phelias, as discussed earlier) and allows cards exiled with him to be returned into play with a finality counter, which can range in power from Solitude (removal) to Overlord of the Balemurk (card advantage and pressure)
