Sl'aevek, Elvish Mercenary

Trample, Haste
Whenever you cast a spell with mana value equal
to or less than Sl'aevek's power target opponent
may have Sl'aevek deal X damage to them or to
target permanent they control where X is the
spells mana value, otherwise, draw half X cards
and put half X +1/+1 counters on Sl'aevek
rounded up.
Your maximum hand size is equal to Sl'aevek's toughness