mtg leinore commander deck Ultra Pro put a +1/+1 counter on up to one target creature you control Leinore, Autumn Sovereign

Most Dominaria United Commander decks contain a Collector Booster Sample Pack in the same language as the deck

Umaro, Raging Yeti* Straight to you from the World of Ruin in the Revival Trance Commander Deck, Umaro is a beast of a design as a 6/6 for 6 with trample who will either pump your board, shoot something, or wheel you each turn at random

With four of these in your arsenal, you could mill almost half of your opponent's 60 card deck, and for a low cost as well

Catch you next week

You can use Monitor Monitor's reroll ability on any die roll, including a roll of the planar die in a Planechase game

From there, its just tons of tomfoolery with spell and permanent switching