Erm ya having 2-3 Veldaken Arcmage -s in ur 90% artifact control deck isnt the only legal way to get 22 over max hand

(And, yes, it is theoretically possible to clamp a colossus to death in paper magic: using deployment in multiplayer teams, opponents having other toughness reducers (e.g.
Phyrexian Boon ) out, or 4x
Skullclamp + 4x
Sculpting Steel + 4x
Copy Artifact 
)
Ultimate Anti-Colossus =
Stuffy Doll + Wither.
I've been playing around with that a bunch for the past couple hours, getting interesting results, e.g.: I have out a 5/-2
Stuffy Doll with Wither (Clamps +
Blight Sickles), Colossus "Tramples" me down 14 life (11 Power - -3 toughness = 14 trample damage

), my wither gets colossus down to 6/6, then the doll's ability activates...

(and I win...Compy's was at five life)
However, I have yet to kill a colossus

.
EDIT: Well I got one withered all the way, but that didn't help... anyways, I need to use darksteel gargoyles (or something) instead of stuffy dolls, those kill the computer too fast.