Another way to deal with commanders is to just keep killing 'em
Assuming your opponent tries to stop it as soon as you lose a flip, with Krark's Thumb out you have a 17.80% chance to drain 31 life (13.35% chance to drain 62!), but unlike most of the other coin flip cards it's not all-or-nothing, you still drain for each previous flip you won
If your opponents can't deal with Evasive characters, they can exert themselves to draw cards and gain lore with no fear of retaliation aside from outright removal
Notably, the spell Deadly Rollick is a powerful form of removal, and costs about half of what this Secret Lair does all on its own
Core Prowler is a combo piece that only has to see one poison counter to kill, and Flesh-Eater imp only asks that you have enough snacks to count to ten
But I think Korvolds attack trigger enables Deathrender to truly shine, especially since youre drawing cards odds are pretty good you can just drop creatures onto the battlefield equipped to Deathrender all over the place