Viktor, Academy Prodigy

When Viktor, Academy Prodigy enters the battlefield, create a gemstone token. (It's an
artefact with "{t}: Add one mana of any colour.")
If Viktor, Academy Prodigy has a shimmer
counter on him, gemstones you control have
"{t}: Add two mana of different colours."
"It's a sad truth that those who shine brightest
often burn fastest." —Heimerdinger