After using up the effect of "Constellar Pleiades", Xyz Summon this card with its own effect while you control a "Constellar Star Chart" to draw 1 card, so that you won't have to take too much effort to Xyz Summoning another "Constellar" Xyz Monster, or in case, that you don't have a destroyed "Constellar" Xyz to revive.
Before Xyz Summoning this card, use "Pleiades" to return "Star Chart" to your hand, and activate it again, so that you can draw another card.
Then, detach "Pleiades", and activate "Xyz Reborn" reviving "Pleiades". Use "Xyz Gift" detaching 2 of this card's Xyz Materials and drawing 2 more cards.
After that use "Pleiades" to, once again, return "Star Chart" to your hand, and activate it. Xyz Summon a second copy of this card so you get 2 copies of this card on your side of the field and 5 additional cards in your hand.
This card can be useful in a Frog Monarch Deck, since most of the "Monarchs" are Level 6. Plus, you can use it to return "Monarchs" such as "Mobius" ", "Caius" and "Raiza" to your hand so you can Summon them on your next turn using "Treeborn Frog".
After Special Summoning "Gigaplant" with "Swing of Memories", etc, and Gemini Summoning it, use the effect of "Gigaplant" to Special Summon "Copy Plant" and use its effect to copy the Level of "Gigaplant", then Xyz Summon this card.