This set is surprisingly packed with interesting, powerful, and even just fun designs, given how parasitic the mechanics are (shrines, lessons, allies, etc.)
Even though its convoke cost means it's a little harder to pull off if you're already going wide with a full board of creatures, being able to flash it into play at any moment can come in clutch during board wipes or if you need to keep a commander alive for another round
Checklist Cards 713.1
And to add some extra glamour, don't miss out on Ultimate Guards latest line of playmats and Sidewinder deck boxes, featuring officially licensed Magic: The Gathering artwork from Aetherdrift
Aetheric Amplifier $11.41 Plan A of Aetheric Amplifier is clearly to double the energy counters you have
The weakness of Griselbrand is that if you are too far behind when you make him you have to wait for him to deal damage before you can risk drawing cards and in this situation you are going to get wreaked by the right removal