Iroh, Dragon of the West Another cool Iroh card, and a great use of mentor
The downside is a card thats hard to use early in the game, but thats a minor drawback compared to the upside on offer
Overall I expect rotation to be a much bigger factor in Standard changing than Bloomburrows release
6 Wheel Of Fortune When you just want to throw caution to the wind and gamble with the top of your library or if you need some way to have everyone discard and then draw a bunch of cards, theres no better choice than Wheel of Fortune
Spreading hexproof around to your creatures and planeswalkers makes most targeted removal against you impossible, letting you set up for a punishing stax strategy or protect your key combo pieces before generating infinite mana and dumping it all into Shalais activated ability
A third Virtue of Knowledge causes abilities to trigger four times, a fourth causes abilities to trigger five times, and so on