As worlds is coming, would like to write some post regarding rulings. As rulings can make you win/lose the game at times. so i had select a few and would like to mention them.
taken from jap wiki:
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Glow up bulb
Q:効果解決時に墓地にこのカードが存在しなくなった場合、デッキの一番上のカードを墓地へ送る処理は行いますか?
A:はい、行います。(11/01/03)
Q: If this card is no longer present in the graveyard when the effect resolves, the process of sending a card to the graveyard on top of the deck I do?
A: Yes, do. (11/01/03)
Q:《次元の裂け目》が存在してる時、このカードの効果を発動できますか?
A:効果でデッキの一番上のカードを墓地へ送るため、発動できます。また、デッキの上のカードが除外された場合でも特殊召喚する効果は適用されます。(10/08/19)
Q: "Rip dimension" when she is present, can trigger the effect of this card?
A: To send a card to the Graveyard by the effect of the top of the deck can be triggered. Moreover, even if the effect of excluding special summon a card on the deck will be applied. (10/08/19)
Yeah, so that is pretty much for glow up bulb. though sending the top card is part of effect, and not a cost, you still have to send it even if glow up bulb is not in grave during resolution. think of it being D.crow.
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Formula synchron
when you accel synchro in your opponent's turn, your opponent has to warning formula and left the other materials untouched.
it will be too late to warning when accel synchro is performed and the monster is already out due to formula's effect.
think of it as you have to warning monster reborn and not warning the monster brought out by reborn.
you can only warning if your opponent's monster which uses it as a tuner during their turn, since it is just a normal synchro summoning.
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will try to update more if i come across any new ones. =)