Set Two Amethyst And Steel Starter Deck Rise Of The Floodborn Merlin and Madam Mim run away with the Amethyst portion of this starter deck
"[Type]cycling [cost]" means "[Cost], Discard this card: Search your library for a [type] card, reveal it, put it into your hand, then shuffle." This type is usually a subtype (as in "Mountaincycling") but can be any card type, subtype, supertype, or combination thereof (as in "basic landcycling")
The best colors for token decks are Green and White for unmatched token generation and doubling effects, with Selesnya (Green-White) being the most reliable way to fill the board with creatures
Meanwhile, Fynn, the Fangbearer was printed in Foundations , which will be Standard-legal until at least 2029, so its Vayne Carudas Solidor alternate version is also Standard-legal until then