I believe its borderline unhealthy for the format
Don't expect things to translate one-to-one from the games
These read incredibly well , especially on larger scenes like Cecil, Dark Knight, or Zodiark Umbral God
Games just finish faster in these environments, and the ramp that mana dorks deliver in early turns is almost always worth the risk of having these effects stapled to weak creatures
For cards legal in tournaments, Mega Charizard EX from the XY era reached 300 damage
Mewtwo (Black Star Promo #12 and #14) represent the early promotional era of the Pokemon TCG, when cards were distributed through an eclectic and sometimes bewildering array of channels including magazines, mail-order promotions, league participation rewards, and retail partnerships