Grithix, Flame Rider Devil

Haste
When Grithix, Flame Rider Devil enters the battlefield, create Flame, a legendary 2/2 red demon hound creature token with haste and "As long as Grithix, Flame Rider Devil is attacking, it gets +2/+2 and gains trample."
Whenever Grithix deals combat damage to a player, put a +1/+1 counter on Flame.