I have a question regarding rootwater matriarch, let's say I have rootwater on the battlefield and then I decide to enchant someone else's creature with curator's ward and then that resolves can I then tap my rootwater and gain control of it? Since I cast the curators ward the hexproof would effect only my opponents correct?
Curator's Ward grants an ability to the enchanted permanent, namely hexproof, which means here, "This permanent can't be the target of spells or abilities your opponents control", where "your" refers to that permanent's controller, not necessarily to you (C.R. 109.5, 702.11b; compare Curator's Ward with Canopy Cover). Thus, if an opponent of yours controls that permanent, that permanent can't be the target of Rootwater Matriarch's ability, since you control that ability (C.R. 112.8).