mtg commander precon decks Starter Decklists Set of 5 MTG Tarkir:

The Floodborn cards Protective Embrace effect grants other characters the Ward keyword, making it valuable as a way of defending against challenges from your rival players

While his life gain aspect is situational and disruptable it is also greatly powerful

Mainstay of Varina decks Teferis Ageless Insight is an easy pick here too

Riku of Two Reflections In a similar vein to Yarok, the Desecrated, Riku of Two Reflections takes the usually slow build-up of energy counter generation and kicks it into overdrive by doubling up on the spells we use to generate and spend those counters

This is my favorite pinpoint bounce spell printed since Capsize since it's a cantrip and cannot be traditionally answered

The deck is chock-full of other instants you want to cast with Kalamax, from Chaos Warp to Temur Charm to the decks free commander spell, Deflecting Swat