yugioh card of consonance YGOrganization A single individual card from the Yu King's Consonance | Card Details

I believe that we can glean a hint of the answer in Mark Rosewater's latest State of Design article, from July this year

When this Class enters, target creature you control deals damage equal to its power to target creature you don't control

If you want something more exploitive of Behold the Beyond, how about Seasons Past

Im incredibly bullish on Halo Fountain as a card first and win condition second, as creating creature tokens and drawing cards for untapping creatures are things almost every white deck wants to do

The only downside is that it only does 20 damage each time it hits so, while it can stall your opponent, it only does so half the time

Wistfulness Though Wistfulness has only been out a short while, it has crept into many formatsStandard, Modern, even Legacy all want cheap artifact/enchantment disruption that becomes a threat and card selection later