So there's a clear answer on this little typographical slip-up: you gotta pay that energy if you want those sweet, sweet card draws
When paired with other effects that require opponents to pay additional resources to cast their spells, whether it be life or mana, when paired with Liesa, opponents can be put in miserable situations in which casting even the most simple of spells is an arduous endeavor
For example, Cayth, Famed Machinist will enter the battlefield as a 3/3 creature, then its fabricate ability goes on the stack
Sacrifice after IV.) I, II, III, IV Stampede
[136] A limited set of land cards in the Secret Lair featured paintings from Bob Ross, licensed through his estate
Sure, you lose life in exchange, but being able to take a problematic enchantment the second it becomes a problem is a huge boost to black decks