Because it reads your linked collection, Augur can recommend upgrades you already own, suggest cards within your budget, and add, remove, or swap printings just by asking
Legendary Creature Human Ninja1/3 Commander ninjutsu ( , Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand or the command zone tapped and attacking.) Whenever a Ninja you control deals combat damage to a player, reveal the top card of your library and put that card into your hand
Note that a lot of planeswalkers (read: Black) have loyalty abilities involving sacrificing creatures, so this makes a good piece of fodder to chuck to that
if there are a critical mass of Allies that reward ETB triggers, then Gideon is an obvious choice
Then, it takes two of your opponent's characters out of the game for a bit, exerting them and not letting them exert on their owners next turn
For example, you can't sacrifice a Food token to activate its own ability and also to activate Bosco, Just a Bear's ability