Ulf, The Brutal End

Flying, haste
Whenever Ulf, The Brutal End attacks, roll a d20
1 | Ulf, The Brutal End deals 0 damage
2-5 | It gains Vigilance until end of turn
6-10 | It gets +2/+0 until end of turn
11-15| It gains First strike until end of turn
16-19| It gains deathtouch until end of turn
20 | It gains all abilites meantioned above