Cheapest priced copy (The List): $34.99 at Card Kingdom, near mint, their price list as of .
Serra Ascendant 
Creature — Human Monk · 1/1 · Rare · Iconic Masters · #31
Lifelink (Damage dealt by this creature also causes you to gain that much life.)
As long as you have 30 or more life, this creature gets +5/+5 and has flying.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
6 printings · $34.99 to $94.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Iconic Masters | 31 | Rare | $39.99 | $59.99 |
| Magic 2011 | 28 | Rare | $37.99 | $49.99 |
| The List | M11-28 | Rare | $34.99 | — |
| Secret Lair Drop | 1125 | Rare | $42.99 | $39.99 |
| Secret Lair Drop (Aang, Ascendant Airbender) | 2291 | Rare | $39.99 | $37.99 |
| Secret Lair Drop | 7145 | Rare | — | $94.99 |
2 rulings from Wizards of the Coast
- 17 November 2017If Serra Ascendant is dealt damage at the same time that you gain life (most likely because it dealt combat damage to a creature blocking or blocked by it), and your life total becomes 30 or greater, apply its last effect before considering whether or not the damage dealt to it is lethal.
- 17 November 2017In a Two-Headed Giant game, anything that cares about your life total checks your team’s life total. Serra Ascendant gets +5/+5 and has flying as long as your team has 30 or more life.