Sun Titan is still a 6/6, and its other ability, vigilance, is past begin relevant for the turn
It comes down early and grows with cards that can be sacrificed, most notably Treasure, but fetch lands also do it
Investors who bought a first-edition Shadowless Charizard for $5,000 in 2013 and sold it for $390,000 in late 2023 saw a return of more than 7,500%
However, in a competitive Magic: the Gathering environment, there are likely better cards with similar effects such as Renewed Faith or Pulse of Murasa that offer more impactful benefits and are more efficient in terms of mana cost and effect, making them more viable options for play over Reaping the Rewards
That makes them especially strong with fetch lands, land-type search effects, and multicolor mana bases
This two-mana enchantment is both a cantrip, drawing a card when it comes into play, and a potential draw engine, letting you draw a card when you cast a spell with mana value of five or more