[+1]: Put three +1/+1 counters on up to one target creature.
[−1]: Reveal cards from the top of your library until you reveal a creature card. Put that card into your hand and the rest on the bottom of your library in a random order.
[−6]: Target creature gets +10/+10 and gains trample until end of turn.

Flying, haste

Trample
Voracious Hydra enters the battlefield with X +1/+1 counters on it.
When Voracious Hydra enters the battlefield, choose one —
• Double the number of +1/+1 counters on Voracious Hydra.
• Voracious Hydra fights target creature you don't control.

: Untap target land you control. It becomes a 5/5 Elemental creature with haste. It's still a land. (This effect lasts as long as that land remains on the battlefield.)

Flying
Creature spells with flying you cast cost less to cast.

Whenever a creature with flying enters the battlefield under your control, Waterkin Shaman gets +1/+1 until end of turn.

Whenever an opponent is dealt noncombat damage, creatures you control get +1/+0 until end of turn.

Wind-Scarred Crag enters the battlefield tapped.
When Wind-Scarred Crag enters the battlefield, you gain 1 life.
: Add or .

This spell costs less to cast if you control a creature with flying.
Draw two cards.

Enchant creature
When Wolfkin Bond enters the battlefield, create a 2/2 green Wolf creature token.
Enchanted creature gets +2/+2.

When Wolfrider's Saddle enters the battlefield, create a 2/2 green Wolf creature token, then attach Wolfrider's Saddle to it.
Equipped creature gets +1/+1 and can't be blocked by more than one creature.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Whenever one or more tokens enter the battlefield under your control, put that many +1/+1 counters on Woodland Champion.

: Add .

Flying
When Yanling's Harbinger enters the battlefield, you may search your library and/or graveyard for a card named Mu Yanling, Celestial Wind, reveal it, and put it into your hand. If you search your library this way, shuffle it.

When Yarok's Fenlurker enters the battlefield, each opponent exiles a card from their hand.
: Yarok's Fenlurker gets +1/+1 until end of turn.

When Yarok's Wavecrasher enters the battlefield, return another creature you control to its owner's hand.

Deathtouch, lifelink
If a permanent entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.