Increasing a creature's power after attackers are declared won't cause a training ability to trigger
Venturing into Dungeons is going to be the source of a ton of value in this format, and Intrepid Outlander can help you do it sometimes A 5-mana 6/2 is not very good, though it does make Pack Tactics get going all on its own, and that certainly is relevant int his format
Some of them, like Chupacabra Echo, give -X/-X to other creatures, while others, like Ravenous Chupacabra and Shriekmaw, straight kill them
This is true for both the creature line-up and the reanimation spell count, but if you do this, you have a solid Commander deck to play with
Loot, the Pathfinder Im not dismissing any card that can enter the battlefield, attack, and draw three cards later