Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand) by sending 3 other monsters from your hand to the Graveyard, and cannot be Special Summoned by other ways. This card's ATK becomes the combined original Levels of the sent monsters x 300.
How to Get
Sends from your hand to your Graveyard for cost
Cannot Normal Summon / Cannot Set / Nomi / Special Summons itself from your hand
Skill: draw sense EARTH + Montage Dragon + 19 high level monsters (level 10 and above) = farming engine.
You need to start 1st, otherwise things can get complicated really quickly;
You need Montage Dragon in hand if you go 2nd, otherwise you're pretty mich toast;
Hope opponent doesn't storm the field and otk you (in case you go second);
Need to take enough damage to activate skill but not too much or you lose (in case you go second).
Idea's not mine. I felt the need to post it for whomever wants to try it.