Safi'Jiiva, Emperor

Flying, menace,
When Safi'Jiiva, Emperor enters the battlefield,
return all creatures you control to your hand. Put
a +1/+1 counter on Safi'Jiiva for each creature
removed from the battlefield this way.
If Safi'Jiiva attacks alone, it gains +4/+0 until end
of turn.
If Safi'Jiiva blocks alone, it gains +0/+4 until end
of turn.
"All will burn."