Boros Blessing

At the beginning of your upkeep, you may pay
{r/w} equal to the number of worship counters
on Boros Blessing and sacrifice it. If you do, draw
cards equal to the mana paid, then, at the
beginning of your next postcombat main phase,
add {x}, where X is the number of times a
creature you control dealt combat damage to a
player that turn.
At the end of your upkeep, you may pay 1 life
to put a worship counter on Boros Blessing.