Ro

{g}{g}{g}{u}
The Fabled Entity Roc. If you can decipher its true name three times and sacrifice 3 entities (one of them must be earth aligned), you can summon Roc to aid you. In addition you will gain 1 earth element every turn, be immune to earth spells, can steal 1 symbol from all opponents every 5 turns (can do upon playing Roc), and receive 1/2 damage from earth entities.