Ral Zarek is most comparable to Ajani Vengeant, who is arguably the third best planeswalker ever after Jace, the Mind Sculptor and Elspeth, Knight-Errant
You can obtain the Clefable (1-Star Shiny rarity) card by opening Fantastical Parade from Fantastical Parade set
Should all else fail, you can go nuclear and hit the Demonic Consultation and Thassa's Oracle combo
In high-level play, opponents will base their attacks on the amount you can probably counter out of your hand
While Unholy Heat is certainly an excellent Magic card, and is one of the most efficient removal spells ever printed, its the only card in the Top 9 that can be easily replaced
You just cant set up Descent of the Dragons if you are casting cards like Avaricious Dragon