They give us players something meaningful to do and good rewards if we achieve them, effectively connecting to the rich FF lore while also staying true to MTG
This can be made easier by cheating the cards out somehow, but the way the card was intended to be used when the cards were made was that you would Normal Summon Aitsu, a Level 5 Normal Monster with 100 ATK and DEF, protect it enough until you could tribute 2 more Monsters to summon Koitsu and then attach Koitsu to Aitsu
Most of the cards here relish being destroyed, with the most egregious include Mementotlan-Horned Dragon which can destroy three face-up cards on the field and Mementotlan Shleepy acting as a Foolish Burial
How do I make a graduation party invitation
Solrock is classified as a 1-Diamond card in the Celestial Guardians set
1Foil Art Extended Art, Showcase, or Borderless Rare or Mythic Rare