Differences on Hit Points rule
At first level, you get maximum hit points for your die. For other levels, instead of rolling for hit points, each level you gain hit points equal to half the die, rounded up.
^^ Dice ^^ Hit points gained ||
|| D4 || 3 (+ con) ||
|| D6 || 4 (+ con) ||
|| D8 || 5 (+ con) ||
|| D10 || 6 (+ con) ||
|| D12 || 7 (+ con) ||