This is a downside if you're removing +1/+1 counters or similar, but removing a lore counter from a saga is all upside, keeping it in play for another turn and rebuying your earlier saga abilities
You may play those cards for as long as they remain exiled, and you may spend mana as though it were mana of any color to cast them

0.7%inclusion 24.5K decks 3.46M decks Gaius van Baelsar 0.7%inclusion 24.1K decks 3.50M decks Torgal, A Fine Hound 0.8%inclusion 24.1K decks 3.15M decks Fang, Fearless l'Cie 0.7%inclusion 23.2K decks 3.56M decks Louisoix's Sacrifice 0.7%inclusion 22.7K decks 3.35M decks Rosa, Resolute White Mage 0.7%inclusion 22.7K decks 3.24M decks Jill, Shiva's Dominant 0.7%inclusion 22.4K decks 3.44M decks Kefka, Court Mage 2.6%inclusion 22.3K decks 868K decks Clash of the Eikons 0.7%inclusion 22.3K decks 3.15M decks Chocobo Kick 0.7%inclusion 22.2K decks 3.12M decks Balamb Garden, SeeD Academy 1.5%inclusion 22.1K decks 1.51M decks Jecht, Reluctant Guardian 0.6%inclusion 21.5K decks 3.53M decks Thunder Magic 0.6%inclusion 21.1K decks 3.40M decks Sephiroth's Intervention 0.6%inclusion 21K decks 3.53M decks Summon: Anima 0.6%inclusion 20.9K decks 3.53M decks Sidequest: Raise a Chocobo 0.7%inclusion 20.6K decks 3.12M decks Samurai's Katana 0.6%inclusion 20.5K decks 3.49M decks Summon: G.F

Anything else specified in the effect creating the token (such as tapped or "Exile that token at end of combat") applies to both the original tokens and the Frog
However, it should be noted that most MTG tournaments dont allow Mox gems because of their rarity and strength
There are quite a few more cards we know from press releases and peeking at other stuff scroll down for every new card