If this card is destroyed by battle or by card effects: Add to your hand 1 "Mythological Pegasus" in your Graveyard
Other than "Fateful Adventure", the engine lacked an efficient way to recover the resources
Although there're these and much more options to gather materials for the original "Polymerization", probably the most recommended method to summon "Wyrm" is by "Dragon's Mirror"
If a Ritual Monster you control attacks a Defense Position monster, inflict piercing battle damage to your opponent
Xtra HERO Wonder Driver X LIGHT Link 2 [ Warrior / LinkEffect ] ATK 1900 DEF - 2 "HERO" monsters If a "HERO" monster is Normal or Special Summoned to your zone this card points to: Target 1 "Polymerization" Spell, 1 "Fusion" Spell, or 1 "Change" Quick-Play Spell in your GY
"Droll & Lock Bird": A-to-Z Decks rely heavily on repeated searching, especially after the XYZ-retrain monsters were released, so "Droll" is extremely effective at shutting them down