2020-04-17 : A mana cost of {X}{X} means that you pay twice X. If you want X to be 3, you pay {6} to cast Cryptic Trilobite.

2020-04-17 : Activated abilities contain a colon, such as Cryptic Trilobite’s activated mana ability and its last activated ability. They’re generally written “[Cost]: [Effect].” Some keyword abilities are activated abilities (such as cycling) and will have colons in their reminder text.

2020-04-17 : You can spend the two colorless mana produced by Cryptic Trilobite on two different activated abilities.