I think its important to buy cards that resonate with you
The strategy is very simple: Play pirates and attack or dont play pirates and lose
In fact, Mother of Runes is so good, there was a modified reprint created for Modern in the form of Giver of Runes, where they added an additional toughness, but they took away one of the strongest parts of the card: the Mother being able to protect herself by targeting herself with her own ability

V Battle Deck [Zeraora V] $13.77 Deoxys V / Zeraora V Battle Decks [Set of 2] $28.02 V Battle Deck Bundle [Deoxys V / Zeraora V] $27.31 Zeraora VMAX & VSTAR Battle Box $95.19 Deoxys/Zeraora VMAX & VSTAR Battle Box [Set of 2] $142.49 Knock Out Collection [Shaymin, Zeraora, and Marshadow] $21.82 Unbroken Bonds Lightning Loop Theme Deck - [Zeraora] $22.13 Mega Zeraora ex - 026/081 #26Double Rare $0.49 Mega Zeraora ex - 027/084 #27Double Rare $0.83 Mega Zeraora ex - 096/081 #96Super Rare $9.46 Mega Zeraora ex - 098/084 #98Ultra Rare $8.81 Mega Zeraora ex - 112/081 #112Special Art Rare $37.53 Mega Zeraora ex - 114/084 #114Special Illustration Rare $71.94 Zeraora #52Holo Rare $1.76 Zeraora #60Rare $0.61 Zeraora #61Holo Rare $0.38 Zeraora #102Rare $0.27 Celebi VMAX #8Ultra Rare $3.95 Zarude #19Holo Rare $0.30 Haunter #56Uncommon $0.19 Scorbunny #26Common $0.12 Larvesta #23Common $0.12 Spheal #37Common $0.16 Volcanion V #25Ultra Rare $0.80 Sneasel #30Common $0.12 Kakuna #2Uncommon $0.08 Raboot #27Uncommon $0.07

That eye-popping price is due to the rarity of the card: Only one is being made, and theres a less than 0.0003 percent chance of finding it in the brands new card set, Hasbro told the WSJ