Attacking creatures you control have deathtouch.
Whenever a creature you control deals combat damage to a player, draw a card.
If one or more creatures you control deal combat damage to players at the same time that lethal damage is dealt to Ohran Frostfang, its ability triggers for each of those creatures.
Snow is a supertype, not a card type. It has no rules meaning or function by itself, but other cards and abilities may refer to it.