Filter by: Card type Creature, Instant, Sorcery, Enchantment, Artifact, Planeswalker, Land Subtype Elf, Goblin, Equipment, Aura, Saga, and hundreds more Supertype Legendary, Snow, Basic Filter by Mana Cost Building a low-curve aggro deck
You can stop an opponent's biggest threats while returning your own permanent hand to dodge removal
Being more general and touched on already for the most part I will briefly state why these mechanisms improve the game
Shrink is a cute spell, with one artwork showing the victim of Shrink about to be crushed by an axe-wielding warrior, and the other artwork showing a witch about to use it on a giant
More importantly, since these have a high mana value, you can easily deal massive damage whenever you pay 3 mana to equip and use them as removal or to deal a big chunk of damage to your opponents