Kicker (You may pay the kicker cost in addition to any other costs as you cast this spell.)
Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.),
haste (This creature can attack, and as soon as it comes under your control.)
If Shatterskull Charger was kicked, it enters the battlefield with a +1/+1 counter on it.
At the beginning of your end step, if Shatterskull Charger doesn't have a +1/+1 counter on it, return it to its owner's hand.