ITT: I try my hand at Heraldic Beasts

[Lonk]

Heraldic Beast Cockatrice
Level 4
WIND
Winged Beast/Effect
ATK/1400 DEF/1500

You can Special Summon this card from your hand while you control no monsters. If this card was used for the Xyz Summon for a "Herald" Xyz Monster: the Xyz Monster gains the following effect: ● While this card is face-up on the field: your opponent cannot Special Summon monsters from the Extra Deck.

Heraldic Beast Kelpy
Level 4
WATER
Beast/Effect
ATK/1700 DEF/1200

When this card is battles another monster: destroy both this card and the battling monster. During the End Phase of the turn this effect was activated; you can Special Summon 1 "Herald" Xyz Monster from your Extra Deck and attach this card and the destroyed monster as Xyz Materials. This Special Summon is treated as an Xyz Summon.

Heraldry Ancestor - Origin
Rank 4
LIGHT
Psychic/Xyz/Effect
ATK/2800 DEF/2400

3 Level 4 "Heraldic Beast" Monsters
When this card is Xyz Summoned: negate the effects of all other face-up cards on the field and face-down cards cannot be flipped face-up. Once per turn; you can detach 1 Xyz Material to destroy 1 card whose effect was negated or cannot be flipped face up by this card's effect. Then, this card gains that card's effect until the End Phase of your opponent's turn.

Perception Medallion
Normal Spell Card

Add 1 "Heraldic Beast" monster or "Herald" Spell or Trap Card from your Deck to your hand. Only 1 "Perception Medallion" can be activated per turn.

Heralry Medallion of the Ancients
Equip Spell Card

equip only to a "Heraldic Beast" monster or a "Herald" Xyz Monster. The equipped monster gains 300 ATK for each monster in the Graveyard and 100 ATK for each banished monster. The equipped monster cannot be targeted by card effects. When the equipped monster would be destroyed: destroy this card instead. If this card is equipped to an Xyz Monster: you can send this card to the Graveyard and attach 1 "Heraldic Beast" monster in your Graveyard to 1 Xyz Monster you control.

Medallion of Heraldry Chaos
Quick Spell Card

Activate by targeting 1 face-up Xyz Monster you control. You can Xyz Summon 1 "Herald" monster from your Extra Deck by using the selected Xyz Monster you control and all of its Xyz Materials as that monster's Xyz Materials. You cannot Special Summon any other monsters until the End Phase of your next turn.