Rock Lee, Handsome Devil

Vigilance, first strike, haste
Rock Lee, Handsome Devil enters the battlefield
with a number of +1/+1 counters equal to half
the amount of mana spent to cast him.
Primary Lotus-{t}:Add {x}, where X is the number
of +1/+1 counters on Rock Lee, Handsome Devil.
This mana cannot be used to cast permanent
spells.