Primal Forcemage

Whenever another creature you control enters, that creature gets +3/+3 until end of turn.

Goblin Chariot

Haste (This creature can attack and {T} as soon as it comes under your control.)

Raging Goblin

Gruul Scrapper

When this creature enters, if {R} was spent to cast it, it gains haste until end of turn.

Mountain

Forest

Gilt-Leaf Alchemist

Thundermare

Haste (This creature can attack and {T} as soon as it comes under your control.)
When this creature enters, tap all other creatures.

Goblin Fire Fiend

Haste
This creature must be blocked if able.
{R}: This creature gets +1/+0 until end of turn.

Elemental

Feral Lightning

Create three 3/1 red Elemental creature tokens with haste. Exile them at the beginning of the next end step.

Undying Rage

Enchant creature
Enchanted creature gets +2/+2 and can't block.
When this Aura is put into a graveyard from the battlefield, return it to its owner's hand.

Salvat 2005