Apex Tree Of Adaptations

Apex creature and Apex enchantment spells you
cast with the converted mana cost of 4 or more
can't be countered.
{r/g}{r/g}, Discard an Apex card from your hand: Add
X mana in any combination of {r} and {g} to your
mana pool. X is equal to the discarded card's
converted mana cost. You can only activate
this ability once per turn.