Albern
i took a look at the leviathans on the whole.
smallest is a 9/8 and the largest is a 10/10
pretty big. i own two of them.
Grozoth. 9/9
(i'm thinking GU and run Krosan Collosus. since you can search your deck for any number of cards that have a converted mana cost of 9. then since your using G you probably have a Krosan Drover. then you can get those nasty big cards for less)
oh right, it has defender but you can pay 4 to ignore the defender part for a turn.
Eater of Days 9/8
makes the smallest of the three at a whopping 9/8 trample for 4...sure you have to skip your next two turns. but with something that big, what does your opponent have that can hit through something that big?
and the one i don't own.
leviathan. 10/10
mighty 10/10 trampler for 9
you have to sac two islands to do anything with this creature (untap, attack) but you probably have land to spare because you played this thing in the first place.
total points, overall pretty tough, simnple creature kill can anniahalte lots of time and effort you put into getting the Leviathan and Grozoth into play (wasted 9 mana) while the Eater has that big loss of two turns.
not bad, not enough other Leviathans to really make these creatures shine and stand out as a tough creature type though. too much rests on having negative abilities for the older ones, and the new one is too overpowered if you can get it out for less then what it costs.
i would have to say stick with the more widely used creatures when dealing with something powerful.
Thorngod
while tough it runs the problem of losing a part, and summoning that thing is a b***h.
okiba
there was a dragon so rare that only one exists now, it was a promotional for winning a tournament. anyways, it is a lot like solarion. except it costs 6RRR to play, it came into play as a measly 0/0 (that came into play with 7 +1/+1 counters) and it's ability allowed you to remove 2 +1/+1 counters to put 3 +1/+1 counters on it for RRR. this was so broken of a card that the only one is under glass. when Mirrodin's Arcbound came out my first thought was the Shichifukujin Dragon. what if since the ability says to target only the counters, to use Arcbound to transfer counters to him? it costs RRR, the ability was the big problem. Solarion is the remake of the Shichifukujin Dragon. the more fair one i suppose, but only if your using like a two color deck.
http://www.wizards.com/default.asp?x=mtgcom/daily/mr163Kasmizar
the invasion dragons were ok, not anything spectacular about them except for Rith and Darigaaz. treva slows your defeat, Dromar bounces stuff (most likely including yours since he is 3 colors), and Crosis can make your opponents discard cards....whoppee
sure the D tyrant is a bit costly, and slow for Red, but it's pretty much a turn KO. it costs 10 to play, you pay 4 the next turn. that leaves 6 to firebreathe it and attack for a doublestriking (flying and trampling) 12/6. now unless your opponent can block at least 4 in the sky, it's game over usually. (but since we are talking about red. you've probably bruned everything that takes up space on your opponents side of the board. including the player themselves, so it shouldn't take that much pain anyways)
as for all other cards named this is for the creatures themselves, comboes can make anything scary. Hell an army of Ornithopters and Taunting elves are scary with Coat of arms in play. be reasonable.
i'm sorry if i've been ranting at all. but i take pride in my reasearch when answering Q's about this stuff.