Runic Armasaur in general seems to have a low ceiling into certain decks, holding it back a bit
Instead, they feature a unique logooften a stylized P or an event-specific icon (like the Disney 100 or D23 stamps)
Gaea's Blessing : Whenever a spell you play is countered, draw a card
Similarly, an ability of another card that instructs you to "transform" one of these cards will cause you to convert it, even if that ability doesn't use the word "convert." More Than Meets the Eye notes: "More Than Meets the Eye [cost]" means "You may cast this card converted by paying [cost] rather than its mana cost." It functions in any zone from which the spell can be cast
Magda, the Hordemaster does nothing to rectify that, though maybe a powerful Treasure-making and Dragon-making ability can compensate for that
Sphinx of the Steel Wind Sphinx of the Steel Wind falls in the keyword soup category of cards