Yes well, if we ignore all the egregous ways you can cheat to not pay the interest (Which I will fix for the next version), it's basically 2 mana since you have to use 1 to pay the interest, and then for the rest of the game you essentially have 1 less mana to work with, so the longer the game the greater the disadvantage.
Yeah, you can build a deck around this card that you can't with the Black Lotus.
But the comment above is saying that is the same as a black lotus "in most decks", not in a extremely specific situation (that you can create).
The advantage of this card in relation to black lotus in a "normal" deck is that on the second turn it's still gives 2 extra mana, and one on the third, but you need to have the cards to try to win the game.
It gives +2 mana the first turn you use it and +1 the second turn. It nets you the exact same amount of mana advantage as Black Lotus, but with major drawbacks.
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u/Kfconsole-eater 8d ago
Probably about as good as black lotus in most decks, exception is underworld breach but 3 mana is still 3 mana