Bestow {W}{W}{W}{W}{W} (If you cast this card for its bestow cost, it's an aura spell with enchant Construct creature. It becomes a creature again if it's not attached to a creature.)

Enchanted creature gains +3/+4.

Totem Armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this aura.)

If B-Buster Drake is sent from the field to the graveyard: you can take one Construct creature with converted mana cost 4 or less, except B-Buster Drake, from your library, reveal it, and put it into your hand. Your library is then shuffled.