Unearth is a triggered keyword ability and can only be countered by spells or effects that can counter abilities and effects, like Mirrorshell Crabs channel ability
BPhillipYork: Built in Reconnaissance Mission is pretty solid, blue has many ways to make creatures unblockable or give them evasion, and this means you just know you'll have the effect on the turn you want it
Optimal Card Count Per Sheet Some useful information to look into is how many cards you can fit on a parent sheet
The full texts of these abilities are "At the beginning of the monarch's end step, that player draws a card" and "Whenever a creature deals combat damage to the monarch, its controller becomes the monarch." If the triggered ability that causes the monarch to draw a card goes on the stack and a different player becomes the monarch before that ability resolves, the first player will still draw the card
Unless your opponent's bench is looking sparse, the randomized Draco Meteor attack might miss Mewtwo EX or Gardevoir entirely
Gravekeeper's Spiritualist X DARK Level 4 [ Spellcaster / Effect ] ATK 1500 DEF 1500 During your Main Phase, if "Necrovalley" is on the field: You can Fusion Summon 1 Spellcaster Fusion Monster from your Extra Deck, using this card you control and other monsters from your hand or field as Fusion Material