At least in Commander he'll be restricted by only playing one of each of those lands, but you can also rely on getting Jodah out on turn four and keeping him out, so I suspect it's a wash, basically
Theres also The Book of Vile Darkness, which fuses together with Eye of Vecna and Hand of Vecna to create Vecna, an 8/8 Zombie God that lets you draw cards, create zombie tokens and just generally be bigger than everything else
Equipment cards like Lightning Greaves, Whispersilk Cloak, and Foot Chopper go quite well with ninja attackers
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It was nothing fancy, but it was an effective weapon for fighting the top tier of that format
They can be distinguished from non-Lesson cards thanks to the parchment and quill watermark in their top-left corners, just next to the card name