Most, if not all counterspells are instants, so anything that synergizes well with casting a lot of instants can reward your counterspell-heavy deck
For the heavy hitters, Im really interested in running Meteoric Mace here
Damaged copies go for roughly $25, while HP copies jump up to the $45 range, followed closely by MP cards that average around $60
NM-LP, English 1 In Stock Fallen Angel 7th Edition The Card Nest Exclusive - DMG, English 1 In Stock The Card Nest Exclusive - DMG, English 1 In Stock The Card Nest Exclusive - DMG, English 1 In Stock Okk - Foil 7th Edition The Card Nest Exclusive - NM, English 1 In Stock The Card Nest Exclusive - NM, English 1 In Stock The Card Nest Exclusive - NM, English 1 In Stock
5 Jace, Memory Adept Jace, Memory Adept is a perfect card for your mill deck
The Swamp shows Godzilla about to face Hedorah, a monster borne of sludge and sheer toxicity (note that Hedorah did not feature in the Godzilla Series for Ikoria: Lair of Behemoths )