Rather than potentially costing more and more as the game goes on, reaching ever higher for bigger targets, Blasphemous Act sets out with an exorbitant starting mana cost that creeps ever smaller as its use becomes increasingly needed
Tarmogoyf currently starts at $ 5.29
I went to a bottle signing event from my favorite rapper - Yelawolf, and he was nice enough to sign my Dark Arbok card
This doesnt even take into account the goblin-specific combos Kiki-Jiki enables: Conspicuous Snoop can make infinite copies of itself with Kiki on top of your library
look for limited editions, mint condition, and signed cards to score a higher value
It effectively only costs one mana (the opportunity cost of tapping it to sacrifice it, when you couldve tapped it for mana instead), and it gets the job done