At the beginning of combat on your turn, create a 1/1 black Rat creature token with "This token can't block." Legendary Creature - Rat Noble Color tag templates(None) Marrow-Gnawer All Rats have fear
Umbreon-GX Full Art (#142): Raw NM $20-35, PSA 10 $100-180
It has 110 HP and can easily last the entire battle, especially when partnered with Koga, which allows you to put your Muk or Weezing from the Active Spot into your hand
SR Super Rare UR Ultra Rare SE Secret Rare UL Ultimate Rare PS Platinum Secret Rare CR COLLECTOR'S RARE QCSE Quarter Century Secret Rare Downerd Magician X DARK Rank 4 [ SpellcasterXyzEffect ] ATK 2100 DEF 200 2 Level 4 Spellcaster monsters During your Main Phase 2, you can also Xyz Summon this card by using a Rank 3 or lower Xyz Monster you control as material
Getting creature token generators out early is very helpful , as this will help you to start forming a battlefield to block incoming attackers while you work on setting up your battlefield.
The most valuable card in the Japanese Terastal Festival set is Umbreon Ex #217 at $395.00