Garruk's Uprising

When this enchantment enters, if you control a creature with power 4 or greater, draw a card.
Creatures you control have trample. (Each of those creatures can deal excess combat damage to the player or planeswalker it's attacking.)
Whenever a creature you control with power 4 or greater enters, draw a card.

Foundations

The List

Bloomburrow Commander

When Garruk's Uprising enters, if you control a creature with power 4 or greater, draw a card.
Creatures you control have trample.
Whenever a creature you control with power 4 or greater enters, draw a card.

Modern Horizons 3 Commander

When Garruk's Uprising enters the battlefield, if you control a creature with power 4 or greater, draw a card.
Creatures you control have trample.
Whenever a creature with power 4 or greater enters the battlefield under your control, draw a card.

Wilds of Eldraine: Enchanting Tales

If one or more static abilities that apply to a creature entering change its power, those abilities are considered when determining whether Garruk's Uprising's last ability triggers. The same is true for replacement effects that apply to it, such as entering with one or more +1/+1 counters or entering as a copy of another creature.

If you don't control a creature with power 4 or greater immediately after Garruk's Uprising enters, its first ability won't trigger. If you don't control one as the ability resolves, you don't draw a card. They don't have to be the same creature both times, however.

Once the last ability of Garruk's Uprising has triggered, lowering the power of the creature or removing it from the battlefield won't stop you from drawing a card.

The first ability of Garruk's Uprising has you draw just one card, no matter how many creatures you control with power 4 or greater.