One boom cycle like that can literally 3x to 10x the values of your good cards
The 1st Edition Blastoise and Venusaur reach into the tens of thousands in top grade, and the Shadowless Charizard runs about $40,000 to $60,000 in PSA 10
Keep sacrificing the Myr Battlesphere and at least one Myr token to recur them endlessly, giving you infinite mana, tokens, and death triggers
Besides, Ballista is just a good card with a deck full of mana dorks and you can Chord of Calling for zero to find it
Yarok, the Desecrated (Halo Foil $25) We want to double up on triggers, and Yarok is another way to do that
When a creature without counters dies, it does not trigger modular