It implies that the card itself should make the decision, if it wants to destroy a target artifact or not
Zask, Skittering Swarmlord Zask, Skittering Swarmlord is already great because you can cast insects and play lands from your graveyard, netting you huge value and pointing at a way to build a deck around it
Keeping Suicune ex active and attacking every turn matters more than setting up multiple threats
Sakura-Tribe Elder Sakura-Tribe Elder isnt a form of mana acceleration that you can generally interact with, but paying two mana to accelerate your mana by one is a fair enough rate
That means that if there are both holofoil and reverse holofoil versions of each card available in a particular set, such as in the Legendary Collection Expansion, the Master Set must include holofoil, reverse holofoil, and non-holo versions of each card (if they exist)