Like Vivyzian, it's a reliable ally, but in addition to closing the door on Traps, it also shuts down floaters, which is simply fantastic
When the original Mirrodin block was released, letting lose Frogmite and Arcbound Ravager to the world, it represented a shift in what artifact decks were capable of
Letting you discard your hand, and draw seven cards in its place, Professor Oak was vital to cycling through your deck, chucking out the duds, and beelining that frightening Gyarados sitting at its heart
They measure not just what cards exist but which cards people care about enough to spend money on professionally preserving
Many a Cube game was lost by animating a summoning-sick land with that card
Visual themes: Watercolor styles or festival themes that appeal to art lovers