mtg elf deck commander Elves - Omnath Locus of Mana Omnath lets you keep all of your unspent green mana COMMANDER Elf Deck Box |

The two ways to do it are either curve into it with creatures or to play spells that put creature tokens onto the battlefield in one fashion or the other

[IV] Mega Flare This creature deals damage equal to the total mana value of other permanents you control to each opponent

This is a great primer to help you get started and evaluate your collections and possible future trades

The closest we have to knowing about The Initiatives return is the Storm Scale

[1] Nomura wanted to create a character that was different from how Black Mages were portrayed in previous games, and to this end he gave her a unique outfit and hairstyle