Colossal Growth

(You can only have one Master Instant in your
library or sideboard.)
Remove X experience counters from yourself:
•Target Creature you control gets +X/+X until
end of turn.
If X is 10 or more, change "target" in this spell
with "each" and you get an emblem with
"Creatures you control have trample."
Exile Colossal Growth.