为 炎血萨坎 寻找最佳的先驱套牌，包括其胜率、热度，以及该牌在万智牌：竞技场中的合法赛制！
: You may discard a card. If you do, draw a card.
: Add two mana in any combination of colors. Spend this mana only to cast Dragon spells.
: Create four 5/5 red Dragon creature tokens with flying.
