If this card is sent to the GY: You can banish this card from your GY; add 1 Level 5 or higher Zombie monster from your Deck to your hand, or, if "Zombie World" is in a Field Zone, you can Special Summon it from your Deck instead, also, in either case, you cannot Special Summon monsters for the rest of this turn, except Zombie monsters. You can only use this effect of "Glow-Up Bloom" once per turn.
Since Special Summoning directly from the deck is so much better than adding a monster to your hand, you should always consider having Zombie World active when using Glow-Up Bloom’s effect. On its own Zombie World is also a great floodgate against decks that base their strategy on a certain type of monster. Use Immortal Ruler to search Zombie World.
High-Leveled Zombie monsters
Here are some powerful Zombie monsters you can Search/Special Summon with Glow-Up Bloom’s effect.
Miss timing only occurs with cards that have "when" and written in the description of their effects. They miss the timing because something happens between the moment the condition for the effect to trigger is fulfilled and the resolution of the effect. One example is Yubel...
If I 🔥 your avatar and you destroy your Yubel yubel will misses the timing because I'll search for neos fusion.