If the second one you cast is countered, you won't win the game
It seems trivial to build your deck in such a way that Lukkas -2 ability gets you whatever creature you want
Thats because some of the most powerful cards currently played in Modern can be cast for free as long as you exile a card of a specific color from your hand
Medomai the Ageless Medomai the Ageless gives UW decks in mid- to low-power Cubes a decent aerial threat that dominates games while being eminently interactable
Flying and mobilize 2 let it pump your team, and when it enters, every creature you control permanently gains menace, lifelink, or hasteyour choice
And, the art doesnt match the card mechanic, which is obtusethey try to justify it in the flavor text, and I do think they justify it quite well in the flavor text, but its just very cover-of-a-1990s fantasy novel