To buy the new skins, a new currency has been added to the game called League Tokens which can be
bought via microtransactions.
Not exact matches
You can
buy these bright engrams with real life money as well
via microtransaction but there isn't a need for it.
Managing to unlock all those characters is an effort that could take you either weeks of irritating grinding, or convince you to plunk down more money to
buy the characters
via microtransactions.
There are also Bright Engrams, awarded for either earning enough experience points or
bought via Destiny 2's
microtransactions.