Heres the real kicker: Once youve sufficiently staxd yourself up with Lich's Mirror or Lich's Tomb, or maybe once you have Phyrexian Unlife in play alongside Solemnity to make you nigh unkillable, you can pay all of your life into Wall of Blood or Fire Covenant
While a 4/1 for 1 is certainly noteworthy, and a 9/7 for 3 is fairly ridiculous, neither of these cards are stellar in the command zone
Side-loading pockets and low-friction material keep cards securely in place
Because of this wide variety of effects, these cards mostly see play when they directly support a decks core strategy rather than because a deck is specifically in the market for 3mv mana dorks
Theres a special corner case when a room becomes a copy of another room
When buying cards, bring along some cards you know are real so you have something to compare the cards in question with