Hope any of the above helps
The Amber Amethyst deck features the Madrigal family, alongside a couple of interesting standalone cards
2005 Pokemon Japanese McDonalds Promo Mew #85 PSA 10 Recently Sold for $750 [Source] Mew cards always tend to fetch high premiums, and this 2005 Japanese Promo is no different
Kaldheim brings with it new keywords such as Foretell, which allows you to exile cards from your hand to play them later for slightly cheaper, and Boast - which is a lot like the Raid mechanic from Tarkir, but this time around you can use special effects on cards for a different cost
Titanias Command is a powerful and flexible spell as it can work as ramp, grave hate, bear token generation (and creature removal with Ayula, Queen Among Bears) and even buff our creatures with 2 +1/+1 counters
These can be true doublers like Doubling Season and Branching Evolution or pseudo-doublers like Hardened Scales and Pir, Imaginative Rascal that technically only add an additional counter, but are close enough since counters are often distributed one at a time