The real strength comes from the effect of that attack, Temporal Leaves, which devolves the opponents Active Pokmon by returning its highest Stage Evolution card to their hand
Certainly Courser isn't trading in that situation but it might well be allowing a Shock to take him down or even a combat trick
One of the most exciting sets for this year is Kamigawa Neon Dynasty, a sequel to the original Kamigawa block
For starters, it is able to deal a decent 60 points of damage, making it able to knock out most weak basic Pokmon or severely wound most stronger cards
Hardened Scales is a staple for +1/+1 counters builds and can really shine in our Ape Tribal as Kibo, Uktabi Prince places one +1/+1 counter at a time on each Ape/Monkey so it becomes a +1/+1 counters doubler
7 Kheru Goldkeeper = Infinite Treasure Standard/Commander/Modern/Pioneer Turns out, Kheru Goldkeeper is one of the stronger cards in Tarkir: Dragonstorm