Akiyama, Timeless Dragonborn

(Partner to any Dragonborn Partners.) All Dragonborn Partners are +1/+1, have Haste
and Vigilance. When he enters battlefield, Akiyama gains +1/+1, has Vigilance, Double Strike, and counters or destroys any 2 target Artifacts or Enchantments.
{r/w}{t}, has Flight, Reach, First Strike
{p/c}{t} play a Thume as if it has Flash.