Proclamator Hailer — Each creature you control gets +1/+1 for each +1/+1 counter on it.

Flying

Hexavus enters the battlefield with six +1/+1 counters on it.

{1}, Remove a +1/+1 counter from Hexavus: Put a flying counter on another target creature.

{1}, Remove a counter from another creature you control: Put a +1/+1 counter on Hexavus.

Domain — Kavu Scout gets +1/+0 for each basic land type among lands you control.

Pentavus enters the battlefield with five +1/+1 counters on it.

{1}, Remove a +1/+1 counter from Pentavus: Create a 1/1 colorless Pentavite artifact creature token with flying.

{1}, Sacrifice a Pentavite: Put a +1/+1 counter on Pentavus.

Flying

Tetravus enters the battlefield with three +1/+1 counters on it.

At the beginning of your upkeep, you may remove any number of +1/+1 counters from Tetravus. If you do, create that many 1/1 colorless Tetravite artifact creature tokens. They each have flying and “This creature can’t be enchanted.”

At the beginning of your upkeep, you may exile any number of tokens created with Tetravus. If you do, put that many +1/+1 counters on Tetravus.

Flying

Triskelavus enters the battlefield with three +1/+1 counters on it.

{1}, Remove a +1/+1 counter from Triskelavus: Create a 1/1 colorless Triskelavite artifact creature token with flying. It has “Sacrifice this creature: This creature deals 1 damage to any target.”