Tidal Warrior and Mishra's Factory Interaction

[Nazgath]

I just came upon this problem in a game:

How does Tidal Warrior (http://magiccards.info/sh/en/47.html) interact with Mishra's Factory (http://magiccards.info/4e/en/181.html)?

[Van Phanel]

I see three possible causes of problems:

a) Tidal Warrior targets Factory and the ability resolves:

Factory is:

Mishra's Factory
Land -- Island
{T}: Add {U} to your mana pool.



b) Tidal Warrior targets an activated Factory:

Factory is:

Mishra's Factory
Artifact Creature -- Assembly-Worker Land -- Island
{T}: Add {U} to your mana pool.
2/2

c) Factory is activated and in response Tidal Warrior is activated, or Tidal Warrior is activated and Factory activated in response:

See b.

[cdr]

212.6h. If an effect changes a land's subtype to one or more of the basic land types, the land no longer has its old land type. It loses all abilities generated from its rules text and its old land types, and it gains the appropriate mana ability for each new basic land type. Note that this doesn't remove any abilities that were granted to the land by other effects. Changing a land's subtype doesn't add or remove any card types (such as creature) or supertypes (such as basic, legendary, and snow) the land may have. If a land gains one or more land types in addition to its own, it keeps its land types and rules text, and it gains the new land types and mana abilities.

[Nazgath]

I know it's been a while, but I just wanted to drop by anyway and say thanks for the help!