Barbarian

{r}{r}: creatures you control
get +1/+0 until end of turn.
Level 2: {3}{r}{r}
all creatures you control gain trample.
Level 3: {3}{r}{r}{r}
{r}{r}: Target creature gets menace until end of turn.
Level 4: {5}{r}{r}
{x}: creature you control get +x/+x
until end of turn
Level 5: {8}{r}{r}
creatures you control get double strike.