Honest's text specifically states that it must be sent from the hand to the graveyard as a cost to activate it's effect, so you cannot activate Honest's effect if Macrocosmos is active on the field.
If the text had read simply "discard this card to..." (like Kuriboh) then you would have been fine.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.