Addition of properties with the same purpose

Possibility of
is possible with:
 * Fast+Speedy, and
 * Hex+Octo+Mega. (Possibilities:
 * Hex+Octo,
 * Hex+Mega,
 * Octo+Mega,
 * Hex+Octo+Mega.)

Trivia

 * Combining every property is VERY dangerous!!!! will then be costing AT LEAST 9001 Stones!
 * But the reality would be 10000 to 15000.
 * And the maximum is 25000(!).
 * ...unless someone wants to change it.