mtg double counters cards Token Doublers That Will Overwhelm your Opponents except it enters with an additional +1/+1 counter on it if its a creature Doubling Season · Wilds of

It's hard to stop with its perfect evasion that no one can block and it's harder to stop as well once you've set up great defenses that would stop the Elf or Viral Drake like flying Fog Banks and reaching Silklash Spiders

The latter build in particular overlaps pretty heavily with the grindy artifact token focus of U/G, giving you another viable splash color to consider

Are There Promo Cards

At the beginning of each opponents draw step, that player draws an additional card for each growth counter on this enchantment, then this enchantment deals damage to the player equal to the number of cards they drew this way

I quite like Louisoixs Sacrifice

There are a couple of directions you can take an Elsha, Threefold Master deck in Commander