mtg jeskai card draw artifact : r/EDH creatures you control get +1/+1 until end of turn The Great EDH Challenge: Jeskai

Krenko, Mob Boss Muxus, Goblin Grandee came for the throne, but theres no topping the boss, Krenko, Mob Boss

+1 Shalai, Voice of Plenty, +1 Lyra Dawnbringer

If you want to learn about sideboarding in limited more, I recommend the courses by Ben Stark and Seth Manfield on Spikes Academy

Free cards or spells cast is powerful, and she churns cards and card advantage powerfully, so folks load her deck up with cheap or free cards with big costs, like Peregrine Drake or Palinchron as well as tons of instants, like the free Snap or Frantic Search, and such

Note that these are the cheapest printings with full text available

But if any copy effects have affected that Pack Rat, they're taken into account