Lobotomy A mind is a terrible thing not to have
Set Boosters Set boosters are the newest addition to the line-up, introduced with 2020's Zendikar Rising
Velomachus Lorehold Velomachus Lorehold gets a nod for being able to hit an opponent and cast a spell from your deck the turn it's played
And we see this in some of the most popular Mono Red commander options on EDHREC: Red is very good at Burn, and three of the top Burn commanders come with built-in resiliency to removal -- Ojer Axonil, Deepest Might, Solphim, Mayhem Dominus, Purphoros, God of the Forge -- which is especially good since Red has basically no good answers to board wipes
Similarly, the equipment sticks around on the battlefield if the creature it's attached to dies
Whether through sacrificing creatures, self-milling, or discarding cards Graveyard decks often care about the number of cards in one's graveyard, and can often use recursion spells or even their commander, to easily access the cards within the graveyard