Yes, Horus Level 6 will stay on the field if Premature Burial is destroyed. This is from the judge list:
If I special summon "Horus the Black Flame Dragon LV 6" from the Graveyard by
the effect of "Premature Burial" and (later in the game) my opponent destroys
"Premature Burial" with "Heavy Storm", "MST", etc. :
Is it correct, that "Horus the Black Flame Dragon LV 6" remains on the field
because the effect of "Premature Burial" of destroying the equipped monster
would disappear since "Horus" is unaffected by any Spell Cards (like a destroyed
"Call Of The Haunted" in combination with "Jinzo") ?
Best regards from Switzerland
Beat Mattle
Answer:
"Horus the Black Flame Dragon LV6" would not be destroyed by the effect of
"Premature Burial" because it is not affected by Spell Cards.
It is a bit different than "Jinzo," because Horus LV6 is doesn't negate the
Spell Card's effect. It just isn't affected by it.
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Curtis Schultz
Official UDE Netrep
CurtisSchultz_Netrep@Hotmail.co