Counterspells are an obvious inclusion, because protecting your very naked five-mana creature is a must
However, some coin flip-focused Pokmon have multiple disruptive attacks , and these cards occasionally see competitive play because of their synergies with other cards
To move a character to a location, this cost must be paid in Ink
In Commander, where mana values are generally higher, its even more important
Whether it ends up being a useful tool for transform decks or not remains to be seen, but for now players are boarding the Moonmist hype train en masse
And in Black with the Cabal Coffers/Urborg combo you can make tons of mana, and this color combo is rich in card drawing for spells like Ancient Craving and Sign in Blood as well as removal like Bedevil and Chaos Warp to have enough for making the 3/3