It's likely to catch removal, but if it sticks you'll have a rapidly growing flier that makes your opponents sacrifice a nonland permanent with every attack
This "put a creature from your hand into play" effect never plays well in Limited as you rarely have something worthwhile
Even with vigilance letting you play offense and defense at the same time, you're not really jamming this in a deck with the intentions of getting the game over quickly
In addition, spells or abilities that check the characteristics of the discarded card can find that card in exile
For players who want to play Cloud, Planet's Champion or Sephiroth, Planet's Heir decks, direct them to the Starter Kit
I still might pull out my pen when I create a 1/1 Hero token, giving it a name within the six-character limit of the original FINAL FANTASY