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.)
When Clackbridge Troll enters the battlefield, target opponent creates three 0/1 white Goat creature tokens.
At the beginning of combat on your turn, any opponent may sacrifice a creature. If a player does, tap Clackbridge Troll, you gain 3 life, and you draw a card.