pokemon pikachu card basic The Company International - 005/025 Colorless Electro Ball (30) Weakness Fighting ×2 Resistance None None Retreat Cost Basic Pikachu HP 60 Charge

The most relevant rules are: 112.3b Activated abilities have a cost and an effect

Whats really fascinating about this card is that its not anywhere near as scarce as some of the other cards on this list, as it was awarded to participants of the 3 on 3 Cup

It enables you to play cards, typically instant and sorceries, for a huge discount, so long as its the first card you drew this turn

Bounce mechanics, timing decisions, resource management

Then later, you can cast it any time you normally could based on its card type but for a separate foretell cost, which is often cheaper than the spells mana cost to account for mana already spent