5 Blood Moon The red enchantment Blood Moon sees ample play in competitive formats like Modern, where it shuts down greedy manabases, and it's just as effective in Commander, where dual lands, tri-lands, and utility lands are often used
13 Temporal Mastery Temporal Mastery is a sorcery card that allows you to do the rare event in which you can take an additional turn following the turn in which it is cast
If not, $5-10 seems more likely
Stonecloaker For 2W, you can exile a card at instant speed in response to something, and then be ready to do it again if you so desire
If a creature under the effects of the first chapter ability can't attack for any reason (such as being tapped or having come under your control that turn), then it doesn't attack
Dragonlord Ojutai Control decks must often be wary of tapping out for their finishers because their opponent could remove them, but Dragonlord Ojutai solves that with hexproof