Keld'on, the Warlord

Keld'on, the Warlord's power and toughness are
each equal to the number of non-wall creatures
you control. Whenever Keld'on, the Warlord
attacks, all non-wall creatures you control gain
Double strike, haste, and trample until the end
of the turn. The defending player discards one
card from the top of their library for each non-
wall creature that attacked with Keld'on, the
Warlord, but was not blocked.
Non-wall creatures you control cannot block.