mtg split second cards Wipe Away ~ Moderately Played Time Spiral Magic UltimateMTG Blue Card MTGNexus - Shorten the Moment

While she isnt really an Angel and doesnt directly reference the tribe, her proliferate ability strengthens +1/+1 counter-based Angels and supports lifegain engines that many Angel builds already lean into

It slots perfectly into decks that want to go wide in the skies, pairing beautifully with anthem effects like Intangible Virtue

While Coram can take a little bit of time to get going and is a bit finicky with the timing of his third ability, he'll either eat a removal spell or get you card advantage

Target opponent loses life equal to its mana value

Most of the things I have designed that I think would benefit the cube are cheap card quality cards and removal

Landfall Whenever a land you control enters, Choco gets +1/+0 until end of turn