It is the cheapest dragon, but the cost and hp stay the same while the attack goes up 1 point. going from 10 to 11 attack is almost a waste of 1500 electrum in this case as you really are not getting any benifit from the expendiature. This card should either drop to 9 cost when upped, or go to 12 attack, even if it means 11 cost.
the benefit is +1 damage! i personally really, really like the ivory dragon as it is, cheap and passable damage (compare that to earth or gravity version, but - exspecially earth - is ok, against damage-cc very nice), i also like mono death decks, and often use ivory dragon in there.
and, hell, who said dragons are for newbies? => major mistake, if you really think this, maybe you are new to this game or you should re-think your strategies.

: 1-4 in many mono-decks, as only creatures of finishers, also nice decks like fahrenheit-dragons here (6 dragons, 4 fhs, 2 deflags, 18 pillars)

: nice synergies with rustlers, often only life mark and light pillars for fast dragons, always 6

: mono-entropy with discords, antimatters, shield(s) and often 4-6 dragons as only creatures (along with maxwells, sometimes)

: shieldlock-dragon already mentioned

: with earth mark or just mono black, always dragons as damage dealers in there

: poisons-bws-arsenics-dragons ... need more?

: often used in mono-air (with eagle eyes+fog/wings for control), or 2-3 iin unstable gas decks)

: i like in earth decks with gravity mark, with pulverizers+gravity pulls, exspecially good against fire+aether (their cc based on damage)

: needs a buff or another use, but mono-gravity often goes with chargers or control with otys, armagios for their life, so no room for dragons.

: rol-hope as dmg-dealer, also nice in mono-light decks

: look at team times last matches at war, main dmg-dealer there

: essence used it quite often in his decks for different events in the past, mono-decks, as usual.