Correction. You need 3 SYNCHRO monsters. That is SIX monsters (at least!). Very difficult to Synchro for if your deck isn't built for it therefore.
It is not easy. Something like Hyper Librarian + 5-star + Formula Synchron or Hyper Librarian + Wonder Magician + Recipro Dragonfly is viable, but with Hyper Librarian's superbroke-ness likely to be gone very soon (next banlist)...
To sum it up, this card is good, but only in a dedicated deck. It isn't easy to get out at all unless you build around it and Hyper Librarian.
It is not easy. Something like Hyper Librarian + 5-star + Formula Synchron or Hyper Librarian + Wonder Magician + Recipro Dragonfly is viable, but with Hyper Librarian's superbroke-ness likely to be gone very soon (next banlist)...
To sum it up, this card is good, but only in a dedicated deck. It isn't easy to get out at all unless you build around it and Hyper Librarian.