REPRINT: Radiant Fountain

IMO slightly simpler than Unknown Shores.

Technically Red Flag due to activated ability - though this is the most basic variant of a mana ability.

> Technically Red Flag due to activated ability - though this is the most basic variant of a mana ability.

Wait, so, would basic lands be red flags as well?

That's why I go with "technically". I just follow the letter of the law.

Basic lands... are an interesting case for multiple reasons:

• They are not common, so red flags are not even checked by NNWO; Basic lands have their own rarity "Land" of (usually) one per pack.
• The activated abilities - if they are printed at all on a card - are inherent to the basic land type which could be considered a keyword. Hence the mana ability would only appear in reminder text; I ignore reminder text already for word count, so...
• Not even the reminder text is usually printed on basic lands in favor of just a big mana symbol.

I personally would exempt the six basic mana abilities from red-flagging, but such an exception is not yet on the book.

Well, now that I think about, red flagging all nonbasic lands would have a lot of merit. It's likely that less enfranchised players, initially at least, think in terms of "I must tap 3 untapped Forests to cast this Leatherback Baloth" rather in the abstractions of mana pools.

On the other hand, ignoring mana abilities in this regard could be reasonable as well, since the other red flags of "no activated abilities" and "only sorcery speed" try to enforce an environment where mana is only used on your main phases to pay for stuff.