Kjolf, Wilds-Marshal

Volley 4 (When this creature attacks, you may tap
up to four other creatures you control. When you do,
it gets +1/+1 until end of turn for each creature
tapped this way.)
Each other Archer you control enters the
battlefield with a +1/+1 counter on it.
At the beginning of your upkeep, if you
control four or more tapped creatures, discard a
card, then draw a card.