oath of the gatewatch booster box The set features two Planeswalker cards Chandra Oath of the Gatewatch -

Her value increases fastest when opponents continue to develop their boards

At the beginning of your end step, if this artifact is untapped, destroy this artifact and it deals damage to you equal to the number of pin counters on it

Bluebeard, the Plunder Patroll Shipwright X WATER Level 4 [ Fiend / Effect ] ATK 500 DEF 1000 If you control a "Plunder Patroll" monster, except "Bluebeard, the Plunder Patroll Shipwright": You can Special Summon this card from your hand

Getting to copy spells often neutralizes any effect they have on you since you get to do the same to them, or at least threaten to

C Common The Fang of Critias X SPELL (This card is also always treated as "Legendary Dragon Critias".) Send 1 Trap from your hand or field to the GY, that is listed on a Fusion Monster that can only be Special Summoned with "The Fang of Critias" (if that card is Set, reveal it), then Special Summon that Fusion Monster from your Extra Deck

Which is why Rhystic Study is the number one MTG best blue cards in commander format