His ability to cast free fatty boom-booms from the top of your deck can finish off a player if its the last opponent youve got to deal with (though you may want to add a Senseis Divining Top or Scroll Rack to make sure theres gas sitting there)
Trample Thrun can't be the target of nongreen spells your opponents control or abilities from nongreen sources your opponents control
Tapped creatures cannot block attacking creatures - they're too sleepy
They can also destroy any permanent (Angel of Despair), gain you life (Angel of Mercy, Lightkeeper of Emeria), destroy many creatures (Sunblast Angel), save creatures (Adarkar Valkyrie, Twilight Shepherd), reanimate (Reya Dawnbringer, Karmic Guide), keep alive indefinitely (Platinum Angel), shut down abilities (Linvala, Keeper of Silence), destroy all lands (Desolation Angel), give your creatures Indestructibility (Deathless Angel), and proactively prevent all combat damage (Blinding Angel)
The Phyrexian War Beasts are super-weird