Overwhelming Onslaught

At the beginning of combat on your turn, Invigorate 3, then each invigorated creature you control gains trample until end of turn. (For each creature you control that isn't invigorated, that creature gets +3/+0 until end of turn and becomes invigorated until end of turn.)
"Sound the Bull-horn. Mount your steeds. Tonight we conquer!"
-Kristoffen Ardzor