In combination with other types of Energy disruption, Team Star Grunt can help put your opponent behind on Energy attachments to the point where they have a difficult time preparing to take knockouts, all while preventing the card they draw at the start of their turn from being anything more than a simple Energy attachment
This card costs X and three green, has Convoke - meaning you can tap creatures to help you pay for the cost - and you can search your library for a creature that costs X or less and put it into play at instant speed
In most games, buying a card pack would treat you to a lavish animation where you see the foil packet tear open, the cards spill out one by one as you see what treasures you've just unlocked
So, attack, hold priority, and activate his ability
Dragonmaid Sheou (2) Fusion, 1 Dragonmaid monster and 1 level 5 or higher Dragon, 3500 ATK and 2000 DEF