It is highly disruptive, it is cheap, instant, offers a wealth of options and reliably gets a two for one
Spawn-Gang Commander's triggered ability will resolve before Spawn-Gang Commander does
Changing the Reserved List While the anti-Reserved List crowd tends to have the misconception that the Reserved List was an outright mistake, rather than a shortsighted solution to a very real problem that could have killed the game two decades ago, the proReserved List crowd as a misconception of its own: that the Reserved List is unchanging and that Wizards has held to its promises for the past 25 years
Plenty of cards have taken the format by storm, but here we are looking for those that almost single-handedly saved an otherwise troubled game
Theres always a premium to pay for being the first to have access to a new card
TL;DR: Land Tax can be treated like a cudgel, constantly searching for 3 basic lands, thinning your deck, and filling your graveyard