At the beginning of your upkeep, any number of target players each mill two cards
BPhillipYork: This can be used to basically just put all your lands into play, and works really well with how many Crucible of Worlds green now has stapled onto creatures
The Reality Chip It feels weird to call The Reality Chip a creature, but it certainly is
Then your Commander will come back with a +1/+1 counter when it dies, if it didn't have one, so that's a nice way of getting one free redo before it heads to your Command Zone, which also encourages the swinging
Arcades became the ruler of Dominaria after the war thanks to Nicol Bolas leaving following his discovery of his spark and becoming a planeswalker
Combine with a Mordor Trebuchet or Fire Navy Trebuchet, and you have a highly effective engine for laying siege on just about anyone