You can only use 1 "Rose Girl" effect per turn, and only once that turn
Once per Chain, during your opponent's Main Phase, you can (Quick Effect): Immediately after this effect resolves, Synchro Summon using this card you control
Of course, you could play Chandra with something like Doubling Season and activate its ultimate immediately
Compared to the three year run of Scarlet & Violet sets, this is a dramatic improvement, with pretty much a 50:50 chance of not getting what is derogatively known as a dud pack. (For those wanting to play the game, theres no such thing as a dud pack, and of course its these people who are most hurt by the current year-long period of scarcity.) However, the cost of this does very much appear to be the pull rates on Special Illustration Rares
Even with this in mind, theres no doubt that this will be an expensive MTG card, purely due to its Commander performance
When you Ritual Summon a Wyrm-Type monster you can banish this card from your GY as tribute as a Level 7 monster." "Can only be Ritual Summoned by the effect of "Mark of Ammon" and cannot be summoned other ways