Weve seen a lot of creatures that generate Energy when they enter the battlefield but have the ability to spend it all during the next attack step to get a +1/+1 counter
You can see Terastal Festival ex's main set list here and its secret rares here
Dark Pokemon, which should not be confused with Dark-type Pokemon, are pocket monsters who have turned to the shadier side of things, almost always due to their trainer being such a character themselves
The card was given out to winners of the Kanto Summer Battle Road tournament in 2002 and came in male and female variants
Design-wise, Sandaconda embodies the themes of camouflage and adaptability, evident in its ability to coil its body into a spiral, resembling a sandbag
Give Affinity a try, and you may be well on your way to Modern mastery