Until end of turn, target creature loses all abilities and becomes a green Snake with base power and toughness 1/1.
Draw a card.
The power/toughness-setting effect overwrites other effects that set power and toughness only if those effects existed before this spell resolved. It will not overwrite effects that modify power or toughness (whether from a static ability, counters, or a resolved spell or ability), nor will it overwrite effects that set power and toughness which come into existence after this spell resolves. Effects that switch the creatureâ€™s power and toughness are always applied after any other power or toughness changing effects, including this one, regardless of the order in which they are created.
Snakeform doesnâ€™t counter abilities that have already triggered or been activated. In particular, there is no way to cast this to stop a creatureâ€™s â€œAt the beginning of your upkeepâ€ or â€œWhen this creature enters the battlefieldâ€ abilities from triggering.
If the affected creature gains an ability after Snakeform resolves, it will keep that ability.
If Snakeform affects a creature with changeling, the creature will lose its changeling ability, and will no longer be all creature types.