Fervor

Creatures you control have haste. (They can attack and {T} as soon as they come under your control.)

Concordant Crossroads

Haste
Whenever a creature you control with haste attacks, create a tapped Treasure token.

Search your library for a card, put that card into your hand, discard a card at random, then shuffle.

Creatures you control have haste.
Sacrifice Fires of Yavimaya: Target creature gets +2/+2 until end of turn.

Trample
Lieutenant — At the beginning of combat on your turn, if you control your commander, put a +1/+1 counter on each creature you control.

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)
Equip {0}

Whenever a permanent you control enters tapped, untap it.

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control.)
Equip {1}

Creatures you control have haste.
{2}{R}, {T}, Sacrifice a land: Create a 3/3 colorless Golem enchantment artifact creature token.

Creatures you control have haste.
Creatures your opponents control enter tapped.

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.

Creature spells you control can't be countered.
Nontoken creatures you control have riot. (They enter with your choice of a +1/+1 counter or haste.)