Reprinted decks (like the Lord of the Rings ones), and secret lair ones, were left out of the consideration
These Magic: The Gathering (MTG) proxy cards are for playtesting only and should not be traded or sold as real cards
This means that if you have a Rishkar, Peema Renegade in play with a +1/+1 counter on it, and you play this toothy beast: If you put the -1/-1 counter on Rishkar, the Peema Renegade will lose its handy +1/+1 counter and won't be able to tap for mana
Realm Seekers: An awesome mid to late game play in Commander
Plenty of the tips above will not be relevant after rotation strikes, but hopefully the general idea stays similar enough that this article is still readable in a few months
Even a few years past its Standard prime, most players recognize an all-time great beatstick