The explosive tempo of Legacy and Vintage, unique among Constructed formats, comes from their avenues of transmuting cards into mana Black Lotus, the Moxen, Channel, Lions Eye Diamond, Dark Ritual, Lotus Petal, Grim Monolith, Cloudpost the list goes on
Despite these facts, it never hurts to have a powerful monster in terms of ATK or DEF, as it can still be difficult to destroy a 5000 DEF monster or avoid being annihilated by one with 5000 ATK
From this, we can take an educated guess which the most valuable are going to be based on how popular the cards are both with players and collectors
If a spell's cost or effect instructs a source with lifelink you control to deal damage, that spell causes that life gain as well
Donphan's Spinning Turn along with Strong Energy was still a good strategy in Expanded, netting multiple Top 4 placements, although no wins
Food Chain + Squee, the Immortal The name may give it away, but Food Chain is the perfect card to use in food-themed decks