Starscourge Radahn

Kicker {2}{r}{g}
Reach, Menace, Trample
When Starscourge Radahn enters the battlefield, each player sacrifices half of their creatures on the battlefield, rounded down.
Put creatures with converted mana cost {4} or less that die while Radahn is on the battlefield on the bottom of your library.
If Radahn was kicked, he enters the battlefield with two +1/+1 counters on him.