Marcheur du cromlech (Henge Walker)
Marcheur du cromlech 
Texte de règles (Oracle, anglais)
Tout ce qui se trouve dans Garenbrig est affecté par la magie sauvage qui parcourt le Grand Cromlech.
Légalité
Précisions de règles (en anglais)
2019-10-04
If an effect allows you to cast a spell without paying its mana cost, you can't choose to cast it and pay unless another rule or effect allows you to cast that spell for a cost. Similarly, you can't waive a cost reduction unless that effect says you may.
2019-10-04
Adamant effects check what mana was actually spent to cast a spell. If an effect allows you to spend mana “as though it were mana” of any color or type, that allows you to spend mana you couldn't otherwise spend, but it doesn't change what mana you spent to cast the spell.
2019-10-04
If you copy a spell that has an adamant ability, no mana was spent to cast the copy at all, so that ability won't apply.