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Swiftfoot Boots

Equipped creature has hexproof and haste.
Equip {1}

Rarity : Uncommon
Types : Artifact
SubTypes : Equipment
Artist : Svetlin Velinov
Flavor : "There is great wisdom in rushing headlong into combat . . . if you're prepared." —Kenjek, captain of the Thousand Swords
Cost converted to mana : 2

Rulings

16 March 2018
If a creature enters the battlefield under your control and gains haste, but then loses it before attacking, it won’t be able to attack that turn. This means that you can’t use one Swiftfoot Boots to allow two new creatures to attack in the same turn.

Warchief Giant

Haste Myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token that's a copy of this creature that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

Abzan Falconer

Outlast {W} ({W}, {T}: Put a +1/+1 counter on this creature. Outlast only as a sorcery.) Each creature you control with a +1/+1 counter on it has flying.