You can move it around later though, and I think you'll be able to find something worth putting it on
(7/26/2024) Any continuous effects with a "for as long as" duration such as that of Mathas, Fiend Seeker ignore phased-out objects
While its true that the card has been reprinted twice in the last three years, those printings were more more uber-mythic than true mythic given the short run nature of the sets, and I have the card on my radar to regain ground to $60 if it manages a strong finish at this tournament
(2021-03-19) If multiple sources would deal damage to an affected target at once, that target or that target's controller chooses which source's damage to prevent for each "shield." (2021-03-19) If multiple replacement effects apply to a player or permanent being dealt damage, that player or the controller of that permanent chooses the order to apply them, not the controller of the source of damage
You may put a historic card from among them into your hand
Mangara is certainly the stronger of the two cards, discouraging your opponents from attacking by granting you an extra card advantage if they attack with two or more creatures, or letting you draw a card when an opponent casts their second card each turn