The basic idea of the Sky Striker strategy is using one main monster, Sky Striker Ace Raye, that can change into many different forms
Grab your Urza's lands and your deck will have the huge mana it needs to cast a Karn
If, during your declare attackers step, Ursine Monstrosity is tapped, is affected by a spell or ability that says it can't attack, or hasn't been under your control continuously since your turn began (and doesn't have haste), then it doesn't attack
Greninja ( Genetic Apex ) and Jolteon ex ( Mega Rising ) can both damage the opponent's Bench with their ability: Greninja has the Ability Water Shuriken, where once during the player's turn they can deal 20 damage to one of the opponent's Pokmon, including Benched Pokmon, and Jolteon ex has Electromagnetic Wall, which deals 20 damage to an opposing Pokmon - including Benched Pokmon - when the opponent attaches Energy from the Energy Zone to that Pokmon
Typically, the newer cards dont tend to be worth much, since they are easily found on the market, making it simple for collectors to find cards to complete their set