yugioh terrain cards Mountain (terrain) Add 1 Field Spell from your Deck to your hand. Mountain - Yugipedia

Despite the fact that it's clearly a goof, Left-Handed Magic Cards also appears to be a typical Secret Lair drop, so we can assume it'll go up for pre-order on the Secret Lair website

The original printing still commands a premium, but for cards that are mostly expensive because they are needed for gameplay purposes, being reprinted does drop the price, as some players will pick up the newer, cheaper version rather than the original

2 Indigo-Eyes Silver Dragon Negate Everything With One Summon If you want a card with a lingering negate that blankets the field, then Indigo-Eyes Silver Dragon is the right choice

Simple will let the computer decide when it should prompt you