Guinea Big

Guinea Big can't be countered.
Convoke, reach, protection from mana value 2
or less
When Guinea Big enters the battlefield, search
your library for a historic card, reveal it and put
it into your hand. Then shuffle.
If one or more +1/+1 counters would be put on
a creature you control, twice that many +1/+1
counters are put on that creature instead.