Serra Angel

Charging Griffin

Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever Charging Griffin attacks, it gets +1/+1 until end of turn.

Heavy Infantry

When Heavy Infantry enters the battlefield, tap target creature an opponent controls.

Valor in Akros

Whenever a creature enters the battlefield under your control, creatures you control get +1/+1 until end of turn.

Akroan Jailer

Grasp of the Hieromancer

Enchant creature
Enchanted creature gets +1/+1 and has "Whenever this creature attacks, tap target creature defending player controls."

Plains

Yoked Ox

Meteorite

When Meteorite enters the battlefield, it deals 2 damage to any target.
{T}: Add one mana of any color.

Mighty Leap

Target creature gets +2/+2 and gains flying until end of turn.

Aegis Angel

Flying (This creature can't be blocked except by creatures with flying or reach.)
When Aegis Angel enters the battlefield, another target permanent gains indestructible for as long as you control Aegis Angel. (Effects that say "destroy" don't destroy it. A creature with indestructible can't be destroyed by damage.)

Sentinel of the Eternal Watch

Vigilance (Attacking doesn't cause this creature to tap.)
At the beginning of combat on each opponent's turn, tap target creature that player controls.