It has 3 downwards pointing arrows, meaning you can go from summoning 1 pendulum monster from the extra deck at a time to 3 all at once
You can draw a card here and there, or ultimate and get a full party going
Source: Pokmon TCG, PokBeach (1, 2)
Its tail is supposed to look like the end point of a oil burner, representing an absence of a lighting part(like Reshiram's torch or Zekrom's generator turbo engines)
This goes so well with +1/+1 and -1/-1 counters, planeswalkers, artifact charge counters, infect/poison the list continues
For this list, Ill talk about the cards that have a major usage rate across the Modern format along with the cards that fit in multiple archetypes, but Ill exclude cards that have been banned or cards that belong to only one deck, like Colossus Hammer