As for Standard and Limited play, we expect to see it a fair bit, especially in Standard, as it could easily slot into the current Simic Ouroboroid or Mono-Green Landfall decks
At the beginning of your upkeep, if you control seven or more Plains, you may return target creature card from your graveyard to the battlefield
Once it resolves, you add one red mana for each card in an opponents hand, that mana sticks around through phases until the end of the turn, and then Inspiring Refrain resuspends itself with another three time counters, letting you cast it again later
There are so many powerful abilities attached to Dragons, along with many having great stats, that Crucible of Fire is the most win more card that can be put into any Dragon deck
This also leads me to the very first 1st edition Pokmon TCG cards: Japanese No Rarity Base Set: Unlike later print runs, the Japanese Base Set has no 1st edition symbol to indicate that its 1st edition