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Does that deck want this

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Rather than paying six mana for Sanctuary Warden (which is still a fine card for these decks) you should first be taking Angelic Sleuth

A creature with indestructible can't be destroyed by damage.) Creature - Angel Sephara, Sky's Blade You may pay and tap four untapped creatures you control with flying rather than pay this spell's mana cost

We're not going in any particular order, I'm just going through cards randomly