Blighted Nightmare and Garvitic Herald Interaction
Gravitoc herald allows to seek a permanent (non land) with mana value 3 or less. Moreover it allows within the same turn to play that card for a warp cost of 0.
Using that I can find blighted nightmare (assuming it’s the only permanent with cost 3 or less in my deck or that I luck out and find it). Blighted nightmare comes back to my hand if I trigger its secondary effect (blight a creature, return one from graveyard with mana value equal or lower than highest thoughness on my board).
That means I should be able to infinitely cycle blighted nightmare as long as I have creatures to feed it (warp for 0, trigger secondary effect, blighted nightmare comes back to hand, repeat).
I tried this in game and after the first time I play blighted nightmare for a warp cost of 0, once it comes back to my hand I can no longer warp it despite the fact that Gravitic herald started the card gets a 0 warp cost till end of the turn.
Appreciate your attention.
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Rezzahan#77802
commented
The card you seek gains warp 0. But as soon as it leaves your hand, it becomes a new object, that does not have warp 0 anymore. You cannot cycle this over and over. It would be a different story, if the warp 0 was a perpetual effect, which would carry over from zone to zone. But it is not, so any temporarily gained effect on the card goes away with a zone change, any zone change.