The issue with that combo is Germination summons a “Copy” of the minion. There’s a chance that the copied minion may not be able to trigger its Spellburst because the first Omu already triggered it. In that case, you essentially get a free Germination, but you won’t be able to repeat Omu’s effect to refresh your mana.

Regardless, this clearly does have strong combo potential. The cost can be reduced by the dormant minion, or you can pull Omu or Malygos with the side quest.
5/5

This card’s a definite sleeper. It demands a response from opponents, which if it doesn’t receive will lead to otk-like shenanigans. If it does get responded to, well you’re opponent used strong removal given its high health. 4/5 in my book.