Strategic Planning: I love this effect
Final Fantasy: Through the Ages features dozens of other cards, and the above list are some other multi-format staples like Fatal Push and Dovin's Veto with awesome new art that won't break the bank for a playset
But the innovation and inclusion of the first relic and autograph cards were the real game changer
Not only does it have great stats for a red creature as a 3/3, but it also 1) triggers every time it or another Kavu enters, 2) has warp, so you can get an extra card off of it when you have two mana, and 3) lets you play the card at any time, not just the turn it's exiled, so long as you control a Kavu
(The card wouldn't work at all otherwise.) This is a very broadly-applicable rule, which applies to any card with an activated or triggered ability that references information about itself when it resolves
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Legal Brisela, Voice of Nightmares Legendary Creature Eldrazi Angel Flying, first strike, vigilance, lifelink Your opponents cant cast spells with mana value 3 or less