Irayek

If red mana was spent to cast Irayek, it enters play
with a haste counter. If white mana was spent to
cast Irayek, it enters play with a first strike counter.
{w},{t}: Put a Sneak counter to Irayek.
{r}: Remove all counters from Irayek. Irayek gets
+X/+X until end of turn, where X is equal to the
number of counters removed.
"Measure them up twice, Strike once."