These tap-dudes-for-mana cards always play out well, though theyre rarely attached to a body like this
If you do, the other player still gets the card with cascade on it, but those cards are usually a lot less powerful than whatever the other cards in that players deck are
For example, you can't sacrifice a Junk token to activate its own ability and also to activate the second ability of Junk Jet
This deck works around colorless cost reduction, meaning you'll still need to pay color-specific mana costs
It looks under-statted as a 3-color Phantom Monster, but it likely picks up +1/+1 counters on ETB and grows very quickly as non-lands get milled over
Throw three free life into the mix and you have equivalent value to an unconditional Searing Blaze, or a Lightning Bolt in mana terms