Pebbles, #GreenTreeLivin

Trample
When Pebbles, #GreenTreeLivin attacks or blocks
flip a coin, on tails it deals no damage, on heads it
has double its power until end of combat.
When Pebbles, #GreenTreeLivin kills a creature
place it under Pebbles, #GreenTreeLivin. It gets
+1/+0 for each card under it.
When Pebbles, #GreenTreeLivin dies, place each
card under it into that players graveyard.