Grand Workshop Plane: Kaladesh Nonartifact spells you cast have improvise
They have fewer hoops to jump, they fit into the Attack, yarrr! theme that pirates have by keeping our boys comin', and some pirates have very good enter-the-battlefield effects that Brass lets us reuse
Its a critique I have heard about myself more than once, so dont bother commenting because I already know what youre thinking
So, what we really want to see on warp cards are good abilities triggering when the permanent enters, considering how this mechanic leads us towards playing a certain number of Flicker spells in order to access a way higher quantity of value
Ghyrson is quite efficient and unique, and synergizes well with tons of cards that are probably already in your Cube
Last Chance + Warriors Oath Last Chance and Warrior's Oath are best in combo-centric decks that can win on their extra turn or decks packing Stifle and Sundial of the Infinite