You'd need something evasive like trample, menace, or flying to guarantee the land
As I explained in a previous column, for a while I was responsible for the vast majority of alternative win card in the game (we finally hired some other designers who also thought alternative wins were cool)
The reason is quite simple: if the back is printed, theres no way to check for security features on that side
Sure, Yargle and Multani only have six toughness and will die to basically any removal spell that's not direct damage, but who cares
Curse of the Cabal also gives a player the option to suspend the effect, meaning it happens later on gradually if they can't afford the ten mana cost off the bat
That's Tithe in a nutshell: Thinning your deck and capable of getting the original dual lands, but what if you really need an enchantment instead of a land