mtg profile cards Magic The Gathering - Commander Masters MTG Character Profile: Urza -

When multiple replacement effects are affecting the same player or object, the affected player or controller of the affected object decides which order they apply in

6 Cromat Cromat is a five-color commander that has five different effects, each requiring two different colored mana to activate

In this example, a Planeswalker featured in Magics in 2019's Ravnica Allegiance Planeswalker set, the mana cost still works much like Shivan Dragon (though you must play a forest and a mountain this time)

Skyboon Evangelist is a white 3/3 flying creature, which gives six other creatures +1/+1 counters when it enters the field

Are you able to and do you want to use mana for the rest of your turn