Block Dragon

Artifact creatures you control have indestructible
unless they are attacking or blocking.
When Block Dragon dies, you may search
your library for up to three artifact creatures with
total mana value 8, put them into
your hand, then shuffle, you can't search your
library additional times this turn.
Escape—{r}{r}{g}{g}, Exile three other green
creatures from your hand or graveyard.
You may escape Block Dragon from your hand.