You activate encore abilities only as a sorcery, meaning during your main phase when you can normally cast sorceries, creatures, and other non-instant spells
Once you familiarize with the Dark World strategy, you will probably be looking to improve the extra deck
If an "Ultimate Crystal" monster attacks, negate the effects of the attack target during that Battle Phase
Pack Contents: 5 Booster Packs, 9-Pocket Binder, Set Checklist
metagame drastically shifted after the February banlist severely nerfed Ishizu-Tearlaments decks, and changed even more with the release of Photon Hypernova
For example, you could have four copies of Mickey Mouse, Wayward Sorcerer and four copies of Mickey Mouse, Brave Little Tailor if you really love the Disney mascot