Custom proxies and alters might cost more, closer to what the actual Magic card costs
Originally inspired by Magic's 'Un-sets' (absurdist, non-competitive, rule-bending cards intended for a silly, fun time) Secret Lairs like this are more collector's items than they are competition-worthy
This will kill the land and allow blowfly infestation to put a counter on another land, which lets you put another counter on another land and so on
For example, suppose Junk Jet is attached to Infesting Radroach, a 2/2 creature
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You do need to be getting in there for The Shadow Lord to shine, so draft a deck that can do that